APA (7. basım) Alıntı

Langan & John. (2006). English Skills (8th ed.). McGraw-Hill.

Chicago Style (17. basım) Atıf

Langan ve John. English Skills. 8th ed. New York: McGraw-Hill, 2006.

MLA (9th ed.) Atıf

Langan ve John. English Skills. 8th ed. McGraw-Hill, 2006.