APA (7th ed.) Citation

Wasserman, A. (2011). Ad Libitum. Opera News, 76(6), 30.

Chicago Style (17th ed.) Citation

Wasserman, Adam. "Ad Libitum." Opera News 76, no. 6 (2011): 30.

MLA (9th ed.) Citation

Wasserman, Adam. "Ad Libitum." Opera News, vol. 76, no. 6, 2011, p. 30.