APA (7th ed.) Citation

Trudgill, P., & Hannah, J. (2002). International english: A guide to the varieties of standard english (4th ed.). Arnold.

Chicago Style (17th ed.) Citation

Trudgill, Peter, and Jean Hannah. International English: A Guide to the Varieties of Standard English. 4th ed. London: Arnold, 2002.

MLA (8th ed.) Citation

Trudgill, Peter, and Jean Hannah. International English: A Guide to the Varieties of Standard English. 4th ed. Arnold, 2002.