APA (7th ed.) Zitazioa

Barham, T. J., & Nelson, D. L. (1991). The boy's changing voice: New solutions for today's choral teacher. Belwin Mills.

Chicago Style (17th ed.) Zitazioa

Barham, Terry Joe, eta Darolyne L. Nelson. The Boy's Changing Voice: New Solutions for Today's Choral Teacher. Miami, Fl.: Belwin Mills, 1991.

MLA (9th ed.) Zitazioa

Barham, Terry Joe, eta Darolyne L. Nelson. The Boy's Changing Voice: New Solutions for Today's Choral Teacher. Belwin Mills, 1991.