Cita APA (7th ed.)

Hackert, A. F., & Sellers, G. R. (1989). College algebra. Harcourt Brace Jovanovich.

Cita Chicago (17th ed.)

Hackert, Adelbert F., i Gene R. Sellers. College Algebra. San Diego, Calif: Harcourt Brace Jovanovich, 1989.

Cita MLA (9th ed.)

Hackert, Adelbert F., i Gene R. Sellers. College Algebra. Harcourt Brace Jovanovich, 1989.