APA

Morell J. A., . (1979). Program evaluation in social research. New York [u.a.]: Pergamon Press.

Chicago

Morell Jonathan A, . 1979. Program evaluation in social research. New York [u.a.]: Pergamon Press.

Harvard

Morell J. A., . (1979). Program evaluation in social research. New York [u.a.]: Pergamon Press.

MLA

Morell Jonathan A, . Program evaluation in social research. New York [u.a.]: Pergamon Press. 1979.