Cita APA (7th ed.)

Weltman, D., & Perez, G. (1987). Intermediate algebra. Wadsworth Pub. Co.

Cita Chicago (17th ed.)

Weltman, Dennis, i Gilbert Perez. Intermediate Algebra. Belmont, Calif: Wadsworth Pub. Co, 1987.

Cita MLA (9th ed.)

Weltman, Dennis, i Gilbert Perez. Intermediate Algebra. Wadsworth Pub. Co, 1987.