Dyfyniad APA

Ackoff, R. (1961). Progress in operations research. John Wiley.

Dyfyniad Arddull Chicago

Ackoff, R.L. Progress in Operations Research. New York: John Wiley, 1961.

Dyfyniad MLA

Ackoff, R.L. Progress in Operations Research. John Wiley, 1961.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.