Dyfyniad APA

Nickels, W. G. (1987). Understanding business (4th ed.). Times Mirror.

Dyfyniad Arddull Chicago

Nickels, William G. Understanding Business. 4th ed. Toronto: Times Mirror, 1987.

Dyfyniad MLA

Nickels, William G. Understanding Business. 4th ed. Times Mirror, 1987.

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