APA (7th ed.) Citation

SERVICE, E. L. The Key to English: Verb. The Macmillan Company.

Chicago Style (17th ed.) Citation

SERVICE, ENGLISH LANGUAGE. The Key to English: Verb. The Macmillan Company.

MLA (8th ed.) Citation

SERVICE, ENGLISH LANGUAGE. The Key to English: Verb. The Macmillan Company.

Warning: These citations may not always be 100% accurate.