APA (7th ed.) Citation

ABC Commercial, Tooth, S., & Cronshaw, J. (2005). Study English: IELTS preparation. ABC Commercial.

Chicago Style (17th ed.) Citation

ABC Commercial, Sarah Tooth, and John Cronshaw. Study English: IELTS Preparation. Ultimo, New South Wales: ABC Commercial, 2005.

MLA (9th ed.) Citation

ABC Commercial, et al. Study English: IELTS Preparation. ABC Commercial, 2005.