APA-viite

Till, D. (1998). Teach yourself PERL 5 in 21 days (with CD) (2nd ed.). Techmedia.

Chicago-tyylinen lähdeviittaus

Till, David. Teach Yourself PERL 5 in 21 Days (with CD). 2nd ed. New Delhi: Techmedia, 1998.

MLA-viite

Till, David. Teach Yourself PERL 5 in 21 Days (with CD). 2nd ed. Techmedia, 1998.