Cita APA (7th ed.)

Hackert, A. F. (1989). College algebra. Harcourt brace jovanovich.

Cita Chicago (17th ed.)

Hackert, Adelbert F. College Algebra. San diego: Harcourt brace jovanovich, 1989.

Cita MLA (9th ed.)

Hackert, Adelbert F. College Algebra. Harcourt brace jovanovich, 1989.