एपीए उद्धरण

(2012). U. P. S. C (I. E. S) engineering services examination: Mechanical engineering solved papers. Koncept Books.

शिकागो स्टाइल उद्धरण

U. P. S. C (I. E. S) Engineering Services Examination: Mechanical Engineering Solved Papers. Dehradun: Koncept Books, 2012.

एमएलए उद्धरण

U. P. S. C (I. E. S) Engineering Services Examination: Mechanical Engineering Solved Papers. Koncept Books, 2012.