Gaya APA

Johnson, D, W., Johnson, F, P. (2009). Joining Together : Group Theory and Group Skills Ed. 10'th (10). New Jersey: Pearson Education.

Gaya MLA

Johnson, David, W.., Johnson, Frank, P.. "Joining Together : Group Theory and Group Skills Ed. 10'th". 10 New Jersey: Pearson Education, 2009. Text.