APA (7th ed.) Citation

Trudgill, P., & Hannah, J. (1994). International English: A guide to varieties of standard English (3. ed.). Arnold.

Chicago Style (17th ed.) Citation

Trudgill, Peter, and Jean Hannah. International English: A Guide to Varieties of Standard English. 3. ed. London u.a: Arnold, 1994.

MLA (9th ed.) Citation

Trudgill, Peter, and Jean Hannah. International English: A Guide to Varieties of Standard English. 3. ed. Arnold, 1994.