APA (7th ed.) Zitazioa

Skrabec, Q. R. (2009). William McGuffey: Mentor to American industry. Algora Pub..

Chicago Style (17th ed.) Zitazioa

Skrabec, Quentin R. William McGuffey: Mentor to American Industry. New York: Algora Pub., 2009.

MLA (9th ed.) Zitazioa

Skrabec, Quentin R. William McGuffey: Mentor to American Industry. Algora Pub., 2009.