Cita APA (7th ed.)

Schmidt, J. (1989). Basics of singing (2nd ed.). Schirmer Books.

Cita Chicago (17th ed.)

Schmidt, Jan. Basics of Singing. 2nd ed. New York: Schirmer Books, 1989.

Cita MLA (9th ed.)

Schmidt, Jan. Basics of Singing. 2nd ed. Schirmer Books, 1989.