एपीए उद्धरण

Hailperin, M., Kaiser, B., & Knight, K. (1999). Concrete abstractions: An introduction to computer science using scheme. Pacific Grove: Brooks/Cole.

शिकागो स्टाइल उद्धरण

Hailperin, Max., Barbara Kaiser, और Karl Knight. Concrete Abstractions: An Introduction to Computer Science Using Scheme. Pacific Grove: Brooks/Cole, 1999.

एमएलए उद्धरण

Hailperin, Max., Barbara Kaiser, और Karl Knight. Concrete Abstractions: An Introduction to Computer Science Using Scheme. Pacific Grove: Brooks/Cole, 1999.