The phrase "a sufficient source" is correct and usable in written English.
It can be used when discussing whether a particular source provides enough information or resources for a specific purpose.
Example: "The research paper cited a sufficient source to support its claims about climate change."
Alternatives: "an adequate source" or "a reliable source".
'Wealth,' wrote JK Galbraith in The Affluent Society, 'has never been a sufficient source of honour in itself.
And the number needed to be high enough to be a sufficient source of concern for Ally".
If you've set the conditions right, the ingredients, combined with a sufficient source of external energy, should evolve to form Danish pastry-like organisms.
As opposed to the Saysians who saw the Depression as an anomaly, some maverick thinkers began to argue that economists had failed to consider that supply was not a sufficient source of demand.
When Morsy won with a 52 percent of the vote, his group convinced him that this is a sufficient source of legitimacy and that the revolution, now that it has fulfilled its main objective, is over.
For transplants of tissues and cells, e.g., pancreatic islet transplantation for patients with diabetes, and corneal transplantation for patients with corneal blindness (whose numbers worldwide are potentially in the millions), allotransplantation will never prove a sufficient source.
The need for a reliable and sufficient source of replacement tissue and organs is constantly increasing, due to our ageing population and consistent lack of donors.
In a paper published a few months later, Popov suggested that such an apparatus could be used for the reception of signals from a man-made source of oscillations, provided a sufficient power source became available.
As explained in detail above, given sufficient source diversity and a weakly scattering environment, the peak of the cross-correlation of signals recorded by two sensors in the environment corresponds to the travel time between them.
Consequently, a sufficient organic source must be provided for proper denitrification.
The flame pattern, which is a combination of the main flame and several permanent flames, provides a sufficient heat source for reliable ignition and steady combustion even for the low-volatile coal-firing and turndown capacity operation, and is advantageous to lower NOx emission.
