Dyfyniad APA

Heyel, C. (1958). Appraising executive performance. American Management Association.

Dyfyniad Arddull Chicago

Heyel, Carl. Appraising Executive Performance. New York: American Management Association, 1958.

Dyfyniad MLA

Heyel, Carl. Appraising Executive Performance. American Management Association, 1958.

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