APA

(1967). Evaluative research; principles and practice in public service & social action programs. New York: Russell Sage Foundation.

Chicago

1967. Evaluative research; principles and practice in public service & social action programs. New York: Russell Sage Foundation.

Harvard

(1967). Evaluative research; principles and practice in public service & social action programs. New York: Russell Sage Foundation.

MLA

Evaluative research; principles and practice in public service & social action programs. New York: Russell Sage Foundation. 1967.