APA (7th ed.) Citation

Immel, C., & Sacks, F. (1994). Better grammar in 30 minutes a day. Pentagon Press.

Chicago Style (17th ed.) Citation

Immel, Constance, and Florence Sacks. Better Grammar in 30 Minutes a Day. India: Pentagon Press, 1994.

MLA (9th ed.) Citation

Immel, Constance, and Florence Sacks. Better Grammar in 30 Minutes a Day. Pentagon Press, 1994.