APA
Kemp C. . G., . (1970). Foundations of group counseling. New York: McGraw Hill.
Chicago
Kemp C Gratton, . 1970. Foundations of group counseling. New York: McGraw Hill.
Harvard
Kemp C. . G., . (1970). Foundations of group counseling. New York: McGraw Hill.
MLA
Kemp C Gratton, . Foundations of group counseling. New York: McGraw Hill. 1970.