APA (7th ed.) Citation

Lam Peng Kwan & Lam, E. Y. K. (2004). Biology: A course for 'O' Level. Federal Publications.

Chicago Style (17th ed.) Citation

Lam Peng Kwan and Eric Y K. Lam. Biology: A Course for 'O' Level. Singapore: Federal Publications, 2004.

MLA (9th ed.) Citation

Lam Peng Kwan and Eric Y K. Lam. Biology: A Course for 'O' Level. Federal Publications, 2004.