APA (7th ed.) Citation

Higgins, B. J., Barker, D. G., Campbell, J. K., & Patterson, L. A. (1990). An investigation of collaboration and its effects on teachers and students.

Chicago Style (17th ed.) Citation

Higgins, Betty Jean, Donald G. Barker, Jack K. Campbell, and Leslie A. Patterson. An Investigation of Collaboration and Its Effects on Teachers and Students. 1990.

MLA (9th ed.) Citation

Higgins, Betty Jean, et al. An Investigation of Collaboration and Its Effects on Teachers and Students. 1990.