Corey, G., Corey, M. S., & Haynes, R. (2000). Evolution of a group: Student video and workbook. Brooks/Cole.
Cita Chicago (17th ed.)Corey, Gerald, Marianne Schneider Corey, i Robert Haynes. Evolution of a Group: Student Video and Workbook. Pacific Grove: Brooks/Cole, 2000.
Cita MLA (9th ed.)Corey, Gerald, et al. Evolution of a Group: Student Video and Workbook. Brooks/Cole, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.