APA

Ackoff R. L., . (1961). Progress in operations research. New York: Wiley.

Chicago

Ackoff Russell Lincoln, . 1961. Progress in operations research. New York: Wiley.

Harvard

Ackoff R. L., . (1961). Progress in operations research. New York: Wiley.

MLA

Ackoff Russell Lincoln, . Progress in operations research. New York: Wiley. 1961.