APA

Willey R. D. V., . (1955). Modern methods and techniques in guidance. New York: Harper.

Chicago

Willey Roy De Verl, . 1955. Modern methods and techniques in guidance. New York: Harper.

Harvard

Willey R. D. V., . (1955). Modern methods and techniques in guidance. New York: Harper.

MLA

Willey Roy De Verl, . Modern methods and techniques in guidance. New York: Harper. 1955.