APA (7th ed.) Citation

Schwartz, R. L., Olson, E. W., & Christiansen, T. (1997). Learning Perl on Win32 systems. O'Reilly.

Chicago Style (17th ed.) Citation

Schwartz, Randal L., Erik W. Olson, and Tom Christiansen. Learning Perl on Win32 Systems. Beijing [etc.]: O'Reilly, 1997.

MLA (9th ed.) Citation

Schwartz, Randal L., et al. Learning Perl on Win32 Systems. O'Reilly, 1997.