APA

Carkhuff R. R., . (1969). Helping and human relations. New York: Holt, Rinehart and Winston.

Chicago

Carkhuff Robert R, . 1969. Helping and human relations. New York: Holt, Rinehart and Winston.

Harvard

Carkhuff R. R., . (1969). Helping and human relations. New York: Holt, Rinehart and Winston.

MLA

Carkhuff Robert R, . Helping and human relations. New York: Holt, Rinehart and Winston. 1969.