Dyfyniad APA

Johnson, D. W., & Johnson, R. T. (1989). Leading the cooperative school. Interaction Book Co.

Dyfyniad Arddull Chicago

Johnson, David W., and Roger T. Johnson. Leading the Cooperative School. Edina, Minn: Interaction Book Co, 1989.

Dyfyniad MLA

Johnson, David W., and Roger T. Johnson. Leading the Cooperative School. Interaction Book Co, 1989.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.