एपीए उद्धरण

Havil, J. (2003). Gamma: Exploring Euler's constant. Princeton University Press.

शिकागो स्टाइल उद्धरण

Havil, Julian. Gamma: Exploring Euler's Constant. Princeton: Princeton University Press, 2003.

एमएलए उद्धरण

Havil, Julian. Gamma: Exploring Euler's Constant. Princeton University Press, 2003.