APA (7th ed.) Citation

Hill, S., & Hill, T. (1990). The collaborative classroom: A guide to co-operative learning. Heinemann.

Chicago Style (17th ed.) Citation

Hill, Susan, and Tim Hill. The Collaborative Classroom: A Guide to Co-operative Learning. Portsmouth, NH: Heinemann, 1990.

MLA (8th ed.) Citation

Hill, Susan, and Tim Hill. The Collaborative Classroom: A Guide to Co-operative Learning. Heinemann, 1990.