Gaya APA

J.Bach, D., J.Leitner, P. (2006). Prealgebra :Mathematics for a Variable World (3). Toronto: McGraw-Hill Higher Education.

Gaya MLA

J.Bach, Daniel., J.Leitner, Patricia. "Prealgebra :Mathematics for a Variable World". 3 Toronto: McGraw-Hill Higher Education, 2006. Text.