APA (7th ed.) Zitazioa

Backus, W. D. (1992). Empowering parents. Bethany.

Chicago Style (17th ed.) Zitazioa

Backus, William D. Empowering Parents. Minneapolis: Bethany, 1992.

MLA (9th ed.) Zitazioa

Backus, William D. Empowering Parents. Bethany, 1992.