[65] Watzlawick, P., J. H. Beavin, and D. D. Jackson. 1967. Pragmatics of Human Communication. New York: Norton.
[66] Weinberg, G. M. and E. L. Schulman. 1974. «Goals and Performance in Computer Programming», Human Factors 16(1): 70–77.
[67] Whitchurch, G. G. and L. L. Constantine. 1992. «Systems Theory», in Sourcebook of Family Theories and Methods: A Contextual Approach, P. B. Boss et al., eds. New York: Plenum.
[68] Wirfs-Brock, R., B. Wilkerson, and L. Weiner. 1990. Designing Object-Oriented Software. Englewood Cliffs, N.J.: Prentice Hall.
[69] Wood, J. and D. Silver. 1989. Joint Application Design. New York: John Wiley amp; Sons.
[70] Yourdon, E., and L. L. Constantine 1974. Structured Design, first printing. New York: Yourdon, Inc.
[71] Zahniser, R. A. 1990. «Building Software in Groups», American Programmer 3(7/8): 50–56.
[72] Zahniser, R. A. 1993. «Design by Walking Around», Communications of the ACM 36(10), October.