Gaya APA

Alexander, D, C., Koeberlein, G, M. (2010). Elementary Geometry For College Students (5). Canada: Brooks/Cole Cengage Learning.

Gaya MLA

Alexander, Daniel, C.., Koeberlein, Geralyn, M.. "Elementary Geometry For College Students". 5 Canada: Brooks/Cole Cengage Learning, 2010. Text.