Version control with Subversion.

Test-driven development:

http://en.wikipedia.org/wiki/Test-driven_development

Kent Beck, Three Rivers Institute
Test-Driven Development By Example

XP:

Kent Beck, Erich Gamma
Extreme Programming Explained Embrace Change


Bourne, S. R.
Операционная система UNIX / Москва : Мир, 1986. 463 p.

Kernighan, Brian W.
UNIX-универсальная среда программирования = 
The UNIX programming environment / Москва : Финансы и статистика, 1992.
304 p.