APA

Watcyn- Jones P., . (2006). Group Work. Intermediate. Harlow: Penguin English.

Chicago

Watcyn- Jones P, . 2006. Group Work. Intermediate. Harlow: Penguin English.

Harvard

Watcyn- Jones P., . (2006). Group Work. Intermediate. Harlow: Penguin English.

MLA

Watcyn- Jones P, . Group Work. Intermediate. Harlow: Penguin English. 2006.