APA (7th ed.) Citation

Haasemann, F., & Jordan, J. M. (1991). Group vocal technique. Hinshaw Music.

Chicago Style (17th ed.) Citation

Haasemann, Frauke, and James M. Jordan. Group Vocal Technique. Chapel Hill, NC: Hinshaw Music, 1991.

MLA (9th ed.) Citation

Haasemann, Frauke, and James M. Jordan. Group Vocal Technique. Hinshaw Music, 1991.