APA استشهاد

Whiting, P. H. (1957). 5 great rules of selling (rev ed.). McGraw-Hill.

استشهاد بنمط شيكاغو

Whiting, Percy H. 5 Great Rules of Selling. rev ed. New York: McGraw-Hill, 1957.

MLA استشهاد

Whiting, Percy H. 5 Great Rules of Selling. rev ed. McGraw-Hill, 1957.