APA ציטוט

Preston, D. R. (1988). Varieties of American English ( Teacher's handbook ). Washington, D.C: United States Department of State.

Trích dẫn kiểu Chicago

Preston, Dennis R. Varieties of American English ( Teacher's Handbook ). Washington, D.C: United States Department of State, 1988.

ציטוט MLA

Preston, Dennis R. Varieties of American English ( Teacher's Handbook ). Washington, D.C: United States Department of State, 1988.