APA (7th ed.) Citation

Brook, G. L. (1973). Varieties of English. Macmillan; St. Martin's P..

Chicago Style (17th ed.) Citation

Brook, G. L. Varieties of English. London : New York: Macmillan; St. Martin's P., 1973.

MLA (9th ed.) Citation

Brook, G. L. Varieties of English. Macmillan; St. Martin's P., 1973.