APA (7th ed.) Citation

Walsh, N. (1999). Learning Perl Tk (1. ed.). O'Reilly.

Chicago Style (17th ed.) Citation

Walsh, Nancy. Learning Perl Tk. 1. ed. Beijing [u.a.]: O'Reilly, 1999.

MLA (9th ed.) Citation

Walsh, Nancy. Learning Perl Tk. 1. ed. O'Reilly, 1999.