Gaya APA

Harpster, R, W. (1984). Technique In Singing: a program for singers and teachers (Pertama, Cet.1). New York: Schirmer Books.

Gaya MLA

Harpster, Richard, W. "Technique In Singing: a program for singers and teachers". Pertama, Cet.1 New York: Schirmer Books, 1984. Text.