Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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