APA (7th ed.) Citation

Ling, J., & Smith, A. (2001). English: Workbook. Federal Publications.

Chicago Style (17th ed.) Citation

Ling, Judy, and Anne Smith. English: Workbook. Singapore: Federal Publications, 2001.

MLA (8th ed.) Citation

Ling, Judy, and Anne Smith. English: Workbook. Federal Publications, 2001.

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