APA (7th ed.) Citation

Khoo, C. S. G., Poo, D. C. C., Toh, T., & Hong, G. (1999). E-Referencer: Transforming Boolean OPACs to Web Search Engines.

Chicago Style (17th ed.) Citation

Khoo, Christopher S. G., Danny C. C. Poo, Teck-Kang Toh, and Glenn Hong. E-Referencer: Transforming Boolean OPACs to Web Search Engines. 1999.

MLA (9th ed.) Citation

Khoo, Christopher S. G., et al. E-Referencer: Transforming Boolean OPACs to Web Search Engines. 1999.