APA (7th ed.) Citation

Gee, R., & Watson, C. (1990). English grammar. Usborne Publishing.

Chicago Style (17th ed.) Citation

Gee, Robyn, and Carol Watson. English Grammar. London: Usborne Publishing, 1990.

MLA (8th ed.) Citation

Gee, Robyn, and Carol Watson. English Grammar. Usborne Publishing, 1990.

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