Cita APA (7a ed.)

Langworth, I., & Chromatic. (2005). Perl testing: A developer's notebook (First edition.). O'Reilly.

Cita Chicago Style (17a ed.)

Langworth, Ian, y Chromatic. Perl Testing: A Developer's Notebook. First edition. Beijing ; Sebastopol, California: O'Reilly, 2005.

Cita MLA (9a ed.)

Langworth, Ian, y Chromatic. Perl Testing: A Developer's Notebook. First edition. O'Reilly, 2005.