Cita APA

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

Chicago Style Citation

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

Cita MLA

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

Atenció: Aquestes cites poden no estar 100% correctes.