APA (7th ed.) Citation

Zambello, K., Loomis, P., Saturnino, P., Greenberg, M., Ulrich, L., Adams, P., . . . Terry, J. (1991). Singers' showcase: April 25, 1991. [publisher not identified].

Chicago Style (17th ed.) Citation

Zambello, Ken, et al. Singers' Showcase: April 25, 1991. [Place of publication not identified]: [publisher not identified], 1991.

MLA (9th ed.) Citation

Zambello, Ken, et al. Singers' Showcase: April 25, 1991. [publisher not identified], 1991.