Παραπομπή σε μορφή APA (7η εκδ.)

Christy, V. A., & Paton, J. G. (2002). Foundations in singing: A basic textbook in vocal technique and song interpretation (7th ed.). McGraw-Hill.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Christy, Van Ambrose, και John Glenn Paton. Foundations in Singing: A Basic Textbook in Vocal Technique and Song Interpretation. 7th ed. Boston: McGraw-Hill, 2002.

Παραπομπή σε μορφή MLA (9th εκδ.)

Christy, Van Ambrose, και John Glenn Paton. Foundations in Singing: A Basic Textbook in Vocal Technique and Song Interpretation. 7th ed. McGraw-Hill, 2002.