APA استشهاد

Haas, F. C. (1968). Executive obsolescence. American management association.

استشهاد بنمط شيكاغو

Haas, Frederick C. Executive Obsolescence. United Staltes of America: American management association, 1968.

MLA استشهاد

Haas, Frederick C. Executive Obsolescence. American management association, 1968.