APA (7th ed.) Citation

Cambridge Research Group, Ltd, & Cambridge Educational (Firm). (1999). Understanding violence. Cambridge Educational.

Chicago Style (17th ed.) Citation

Cambridge Research Group, Ltd, and Cambridge Educational (Firm). Understanding Violence. South Charleston, W.Va.: Cambridge Educational, 1999.

MLA (9th ed.) Citation

Cambridge Research Group, Ltd, and Cambridge Educational (Firm). Understanding Violence. Cambridge Educational, 1999.