Cita APA

Bergsma, W. 1., & Bergsma, W. 1. (1957). Riddle me this: For unaccompanied mixed chorus (S.A.T.B.). New York: Galaxy Music.

Citación estilo Chicago

Bergsma, William 1921-1994, y William 1921-1994 Bergsma. Riddle Me This: For Unaccompanied Mixed Chorus (S.A.T.B.). New York: Galaxy Music, 1957.

Cita MLA

Bergsma, William 1921-1994, y William 1921-1994 Bergsma. Riddle Me This: For Unaccompanied Mixed Chorus (S.A.T.B.). New York: Galaxy Music, 1957.