APA-referens (7:e uppl.)

Steinlage, R. C. (1990). College algebra (3rd ed.). West Pub. Co..

Chicago-referens (17:e uppl.)

Steinlage, Ralph C. College Algebra. 3rd ed. St. Paul, MN: West Pub. Co., 1990.

MLA-referens (9:e uppl.)

Steinlage, Ralph C. College Algebra. 3rd ed. West Pub. Co., 1990.