Cita APA (7a ed.)

Lemay, L. (1999). Sams teach yourself Perl in 21 days. Sams Pub. ; techmedia.

Cita Chicago Style (17a ed.)

Lemay, Laura. Sams Teach Yourself Perl in 21 Days. Indianapolis, Ind. : New Delhi: Sams Pub. ; techmedia, 1999.

Cita MLA (8a ed.)

Lemay, Laura. Sams Teach Yourself Perl in 21 Days. Sams Pub. ; techmedia, 1999.