APA (7th ed.) Citation

Howe, D. (1973). Active English: Introductory Book. Oxford Univercity press.

Chicago Style (17th ed.) Citation

Howe, D.H. Active English: Introductory Book. New Delhi: Oxford Univercity press, 1973.

MLA (9th ed.) Citation

Howe, D.H. Active English: Introductory Book. Oxford Univercity press, 1973.