APA استشهاد

Drucker, P. F. (1982). Changing world of the executive. Truman Talley Books.

استشهاد بنمط شيكاغو

Drucker, Peter F. Changing World of the Executive. Newyork: Truman Talley Books, 1982.

MLA استشهاد

Drucker, Peter F. Changing World of the Executive. Truman Talley Books, 1982.