APA (7th ed.) Zitazioa
Ingram, M. D. (1962). Vocal technique for children and youth. Abingdon.
Chicago Style (17th ed.) Zitazioa
Ingram, Madeline D. Vocal Technique for Children and Youth. New York: Abingdon, 1962.
MLA (9th ed.) Zitazioa
Ingram, Madeline D. Vocal Technique for Children and Youth. Abingdon, 1962.
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