एपीए उद्धरण

Keifer, C. (2012). Quantum Gravity (Third Edition.). Oxford University Press.

शिकागो स्टाइल उद्धरण

Keifer, Claus. Quantum Gravity. Third Edition. Oxford University Press, 2012.

एमएलए उद्धरण

Keifer, Claus. Quantum Gravity. Third Edition. Oxford University Press, 2012.