APA (7th ed.) Citation

Doorley, D., Shovel, M., & Cottam, C. (1993). Discovering English: Workbook. Mladé letá.

Chicago Style (17th ed.) Citation

Doorley, Damien, M. Shovel, and Colin Cottam. Discovering English: Workbook. Bratislava: Mladé letá, 1993.

MLA (9th ed.) Citation

Doorley, Damien, et al. Discovering English: Workbook. Mladé letá, 1993.