APA استشهاد

Douglas, L. V. (1973). Teaching business subjects (3rd. ed.). Prentice Hall.

استشهاد بنمط شيكاغو

Douglas, Llyod V. Teaching Business Subjects. 3rd. ed. New Jersy: Prentice Hall, 1973.

MLA استشهاد

Douglas, Llyod V. Teaching Business Subjects. 3rd. ed. Prentice Hall, 1973.