APA-referens (7:e uppl.)

Dugopolski, M. (2004). Elementary algebra (Fourth edition.). McGraw-Hill.

Chicago-referens (17:e uppl.)

Dugopolski, Mark. Elementary Algebra. Fourth edition. Boston: McGraw-Hill, 2004.

MLA-referens (8:e uppl.)

Dugopolski, Mark. Elementary Algebra. Fourth edition. McGraw-Hill, 2004.