APA (7th ed.) Citation

Farrell, E. R., & Farrell, C. F. (1995). Side by side: Spanish & English grammar. Passport Books.

Chicago Style (17th ed.) Citation

Farrell, Edith R., and C. Frederick Farrell. Side by Side: Spanish & English Grammar. Lincolnwood, Ill., USA: Passport Books, 1995.

MLA (9th ed.) Citation

Farrell, Edith R., and C. Frederick Farrell. Side by Side: Spanish & English Grammar. Passport Books, 1995.