APA (7th ed.) Citation

(1999). Opus. Warwick Pub. Group, Inc..

Chicago Style (17th ed.) Citation

Opus. Toronto, Ont.: Warwick Pub. Group, Inc., 1999.

MLA (8th ed.) Citation

Opus. Warwick Pub. Group, Inc., 1999.

Warning: These citations may not always be 100% accurate.