Andersen, E. S., Wiig, R., Gibbons, T., Haug, T., Grude, K. V., Institute of Directors, & Coopers & Lybrand. (1987). Goal directed project management: Effective techniques and strategies (2nd ed.). London: Kogan Page.

Andersen, Erling S., Roberta Wiig, Terry Gibbons, Tor Haug, Kristoffer V. Grude, Institute of Directors, and Coopers & Lybrand. Goal Directed Project Management: Effective Techniques and Strategies. 2nd ed. London: Kogan Page, 1987.

Andersen, Erling S., et al. Goal Directed Project Management: Effective Techniques and Strategies. 2nd ed. London: Kogan Page, 1987.