APA (7th ed.) Zitazioa

Hughes, S. (1990). Understanding guidance. Waverly Abbey House.

Chicago Style (17th ed.) Zitazioa

Hughes, Selwyn. Understanding Guidance. Farnham: Waverly Abbey House, 1990.

MLA (9th ed.) Zitazioa

Hughes, Selwyn. Understanding Guidance. Waverly Abbey House, 1990.