Hailperin, M., Kaiser, B. K., & Knight, K. (1999). Concrete abstractions: An introduction to computer science using Scheme. Brooks/Cole Pub.
Citazione stile Chigago Style (17a edizione)Hailperin, Max, Barbara K. Kaiser, e Karl Knight. Concrete Abstractions: An Introduction to Computer Science Using Scheme. Pacific Grove: Brooks/Cole Pub, 1999.
Citatione MLA (9a ed.)Hailperin, Max, et al. Concrete Abstractions: An Introduction to Computer Science Using Scheme. Brooks/Cole Pub, 1999.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.