Cita APA (7a ed.)

Lemay, L., & Colburn, R. (2002). Sams teach yourself Perl in 21 days (2nd ed.). Sams.

Cita Chicago Style (17a ed.)

Lemay, Laura, y Rafe Colburn. Sams Teach Yourself Perl in 21 Days. 2nd ed. Indianapolis, Ind.: Sams, 2002.

Cita MLA (9a ed.)

Lemay, Laura, y Rafe Colburn. Sams Teach Yourself Perl in 21 Days. 2nd ed. Sams, 2002.