APA (7th ed.) Citation

Foster, B. (1968). The changing English language. Macmillan [u.a.].

Chicago Style (17th ed.) Citation

Foster, Brian. The Changing English Language. London [u.a.]: Macmillan [u.a.], 1968.

MLA (9th ed.) Citation

Foster, Brian. The Changing English Language. Macmillan [u.a.], 1968.