Computer Systems Research Group, UC Berkeley. 4.4BSD Programmer's Reference Manual. O'Reilly & Associates, Inc., 1994. ISBN 1-56592-078-3
Computer Systems Research Group, UC Berkeley. 4.4BSD Programmer's Supplementary Documents. O'Reilly & Associates, Inc., 1994. ISBN 1-56592-079-1
Harbison, Samuel P. and Steele, Guy L. Jr. C: A Reference Manual. 4th ed. Prentice Hall, 1995. ISBN 0-13-326224-3
Kernighan, Brian and Dennis M. Ritchie. The C Programming Language.. 2nd Ed. PTR Prentice Hall, 1988. ISBN 0-13-110362-8
Lehey, Greg. Porting UNIX Software. O'Reilly & Associates, Inc., 1995. ISBN 1-56592-126-7
Plauger, P. J. The Standard C Library. Prentice Hall, 1992. ISBN 0-13-131509-9
Spinellis, Diomidis. Code Reading: The Open Source Perspective. Addison-Wesley, 2003. ISBN 0-201-79940-5
Marshall Kirk McKusick, George V. Neville-Neil. The Design and Implementation of the FreeBSD UNIX Operating System. Boston, Mass. : Addison-Wesley, 2004. ISBN 0-201-70245-2
Spinellis, Diomidis. Code Quality: The Open Source Perspective. Addison-Wesley, 2006. ISBN 0-321-16607-8
Stevens, W. Richard. Advanced Programming in the UNIX Environment. Reading, Mass. : Addison-Wesley, 2005. ISBN 0-201-43307-9
Stevens, W. Richard. UNIX Network Programming. 2nd Ed, PTR Prentice Hall, 1998. ISBN 0-13-490012-X