Dyfyniad APA

Langan, J. (1981). English Skills (2nd ed.). McGraw-Hill.

Dyfyniad Arddull Chicago

Langan, John. English Skills. 2nd ed. New York: McGraw-Hill, 1981.

Dyfyniad MLA

Langan, John. English Skills. 2nd ed. McGraw-Hill, 1981.

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