APA (7th ed.) Citation

Dilworth, T., Watts, I., & Ken, T. A new guide to the English tongue: In five parts. ... (The fifteenth edition.).

Chicago Style (17th ed.) Citation

Dilworth, Thomas, Isaac Watts, and Thomas Ken. A New Guide to the English Tongue: In Five Parts. ... The fifteenth edition.

MLA (9th ed.) Citation

Dilworth, Thomas, et al. A New Guide to the English Tongue: In Five Parts. ... The fifteenth edition.