APA (7th ed.) Citation

Tan, Y. S. (2002). Phone directory information system PDIS / Tan Yin Shuen.

Chicago Style (17th ed.) Citation

Tan, Yin Shuen. Phone Directory Information System PDIS / Tan Yin Shuen. 2002.

MLA (9th ed.) Citation

Tan, Yin Shuen. Phone Directory Information System PDIS / Tan Yin Shuen. 2002.

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