APA (7th ed.) Citation

Safari Tech Books Online, Bradshaw, L. A., Gerken, T. C., & Merrall, G. C. (2001). PHP3 and PHP4 Functions Essential Reference. Sams.

Chicago Style (17th ed.) Citation

Safari Tech Books Online, Landon Author Bradshaw, Till Contributor Gerken, and Graeme Contributor Merrall. PHP3 and PHP4 Functions Essential Reference. [Place of publication not identified]: Sams, 2001.

MLA (9th ed.) Citation

Safari Tech Books Online, et al. PHP3 and PHP4 Functions Essential Reference. Sams, 2001.