- $3.98Learning Perl by Tom, Schwartz, Randal L. PhoenixBetter World Books
- $5.51Programming Perl by Larry, Christiansen, Tom, Schwartz, Randal L. WallBetter World Books
- $5.26Learning Perl by brian d, Phoenix, Tom, Schwartz, Randal L. foyBetter World Books
- $5.63Learning Perl on Win32 Systems : Perl Programming in Win32 by Tom, Schwartz, Randal, Olson, Erik ChristiansenBetter World Books