APA (7th ed.) Citation

Schwartz, R. L., Phoenix, T., & Foy, B. D. (2005). Learning Perl (4. ed., covers Perl 5.8.). O'Reilly.

Chicago Style (17th ed.) Citation

Schwartz, Randal L., Tom Phoenix, and Brian D. Foy. Learning Perl. 4. ed., covers Perl 5.8. Beijing [u.a.]: O'Reilly, 2005.

MLA (9th ed.) Citation

Schwartz, Randal L., et al. Learning Perl. 4. ed., covers Perl 5.8. O'Reilly, 2005.