APA استشهاد

Walton,Gary M, & Wykoff,Frank C. (1986). Understanding economics today (5.). Irwin.

استشهاد بنمط شيكاغو

Walton,Gary M, و Wykoff,Frank C. Understanding Economics Today. 5. Chicago: Irwin, 1986.

MLA استشهاد

Walton,Gary M, و Wykoff,Frank C. Understanding Economics Today. 5. Irwin, 1986.