"creditable by" is correct and usable in written English.
It's used to describe an action or accomplishment which is noteworthy or admirable. For example: "The company's decision to invest in renewable energy was seen as highly creditable by many in the industry."
There are also creditable cakes by various local bakers.
In this context, Mr Veres could have been considered to have done a creditable job by meeting the initial 2007 target of a deficit of 6.8% of GDP.
Last season Everton finished seventh in the Premier League, a creditable achievement by David Moyes and his players considering the club's modest financial resources.
England will put on a creditable performance by making it into the semi-finals, according to the bank's predictions, losing out to Spain.
Gene played in two games, a 28-28 dragainstnsTongagatat Hull's old Boulevard ground, and a creditable defeat by St Helens at Knowsley Road – and has never left.
Though early days saw creditable forays by Rage Against the Machine, and hook-ups between major acts such as Anthrax and Public Enemy, who toured together to the bemusement of many, rap-metal soon became a more base fusion, fuelled by aggression, baggy shorts and testosterone.
A victory for Mr Campos would be a big upset; a strong second place would gain him a national profile and position him well for 2018.A creditable showing by the national team in the football World Cup in June and July, three months before the election, would add some fizz to Ms Rousseff's campaign, though the extent to which soccer success translates into votes is questionable.
Jennifer Carey did not progress in the 400 metres after finishing sixth in her heat but it was a creditable performance by the American-born athlete who blocked her second best ever time with a 52.62 clocking -.33 outside her personal best set earlier this season.g.g
If the members of IBM's DeepQA project are able to realize that objective, then I would accept a creditable performance by Blue Gene as a contestant on Jeopardy as an affirmative answer to the question "can machines think?" Were Turing alive, I'm willing to bet that he would too.
He later claimed to have produced creditable poems by his early teens, but these have been lost.
