APA
Walker E. L., . (1969). Conditioning and Instrumental Learning. : Prentice-Hall of India Pvt, Ltd.
Chicago
Walker Edward L, . 1969. Conditioning and Instrumental Learning. : Prentice-Hall of India Pvt, Ltd.
Harvard
Walker E. L., . (1969). Conditioning and Instrumental Learning. : Prentice-Hall of India Pvt, Ltd.
MLA
Walker Edward L, . Conditioning and Instrumental Learning. : Prentice-Hall of India Pvt, Ltd. 1969.
