APA (7th ed.) Citation

Gregg, T. A., & Tremiszewska, M. (2008). Voice students of Thomas Gregg. [publisher not identified].

Chicago Style (17th ed.) Citation

Gregg, Thomas Andrew, and Maja Tremiszewska. Voice Students of Thomas Gregg. [Place of publication not identified]: [publisher not identified], 2008.

MLA (9th ed.) Citation

Gregg, Thomas Andrew, and Maja Tremiszewska. Voice Students of Thomas Gregg. [publisher not identified], 2008.