Dyfyniad APA

Churchman, C. W. (1979). The systems approach: Revised and updated. New York: Dell Publishing Co., Inc.

Dyfyniad Arddull Chicago

Churchman, C. West. The Systems Approach: Revised and Updated. New York: Dell Publishing Co., Inc, 1979.

Dyfyniad MLA

Churchman, C. West. The Systems Approach: Revised and Updated. New York: Dell Publishing Co., Inc, 1979.

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