Gaya APA

Johnson, D, W., Johnson, R, T. (1999). Learning together and alone: cooperative, competitive, and individualistic learning (Cet. 10). Massachusetts: Allyn and Bacon.

Gaya MLA

Johnson, David, W.., Johnson, Roger, T.. "Learning together and alone: cooperative, competitive, and individualistic learning". Cet. 10 Massachusetts: Allyn and Bacon, 1999. Text.