APA (7th ed.) Citation

Mann, Cheong, & Lim. (1997). Stepping forward: Workbook 4 : normal (academic). Pan Pacific Publishing.

Chicago Style (17th ed.) Citation

Mann, Cheong, and Lim. Stepping Forward: Workbook 4 : Normal (academic). Singapore: Pan Pacific Publishing, 1997.

MLA (8th ed.) Citation

Mann, et al. Stepping Forward: Workbook 4 : Normal (academic). Pan Pacific Publishing, 1997.