APA

Voich D., Wren D. A. & Froemke R. L. (1968). Principles of management: resources and systems. New York: Ronald Press Co.

Chicago

Voich Dan, Wren Daniel A and Froemke Robert Lawrence. 1968. Principles of management: resources and systems. New York: Ronald Press Co.

Harvard

Voich D., Wren D. A. and Froemke R. L. (1968). Principles of management: resources and systems. New York: Ronald Press Co.

MLA

Voich Dan, Wren Daniel A and Froemke Robert Lawrence. Principles of management: resources and systems. New York: Ronald Press Co. 1968.