Citazione Stile APA (7a Edizione)

Ingram, M. D. (1962). Vocal technique for children and youth. Abingdon.

Citazione stile Chigago Style (17a edizione)

Ingram, Madeline D. Vocal Technique for Children and Youth. New York: Abingdon, 1962.

Citatione MLA (9a ed.)

Ingram, Madeline D. Vocal Technique for Children and Youth. Abingdon, 1962.