Till, D. (1998). Teach yourself PERL 5 in 21 days (with CD) (2nd ed.). Techmedia.
Chicago Edition CitationTill, David. Teach Yourself PERL 5 in 21 Days (with CD). 2nd ed. New Delhi: Techmedia, 1998.
Deismireacht MLATill, David. Teach Yourself PERL 5 in 21 Days (with CD). 2nd ed. Techmedia, 1998.
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