Gaya APA

SUnd, R, B., Carin, A, A. (1971). Developing Questioning Techniques A Self-concept Approach . Columbus, Ohio: Charles E. Merrill Publishing Company.

Gaya MLA

SUnd, Robert, B.., Carin, Arthur, A.. "Developing Questioning Techniques A Self-concept Approach". Columbus, Ohio: Charles E. Merrill Publishing Company, 1971. Text.