APA-referens (7:e uppl.)

Steffensen, A. R. (1992). College algebra: A problem-solving approach (2nd.ed.). Harper Collins.

Chicago-referens (17:e uppl.)

Steffensen, Arnold R. College Algebra: A Problem-solving Approach. 2nd.ed. New York: Harper Collins, 1992.

MLA-referens (9:e uppl.)

Steffensen, Arnold R. College Algebra: A Problem-solving Approach. 2nd.ed. Harper Collins, 1992.