Cita APA (7th ed.)

Certo, S. C. (1995). Human relations today: Concepts and skills. Irwin.

Cita Chicago (17th ed.)

Certo, Samuel C. Human Relations Today: Concepts and Skills. Chicago: Irwin, 1995.

Cita MLA (9th ed.)

Certo, Samuel C. Human Relations Today: Concepts and Skills. Irwin, 1995.