APA (7th ed.) Citation

Schwartz, R. L., Foy, B. D., & Phoenix, T. (2011). Learning Perl (6a. ed.). O`Reilly Media.

Chicago Style (17th ed.) Citation

Schwartz, Randal L., Brian D. Foy, and Tom Phoenix. Learning Perl. 6a. ed. Sebastopol: O`Reilly Media, 2011.

MLA (9th ed.) Citation

Schwartz, Randal L., et al. Learning Perl. 6a. ed. O`Reilly Media, 2011.