Citazione Stile APA (7a Edizione)

Keen, J. S. (1987). Managing systems development (2nd ed.). John Wiley & Sons.

Citazione stile Chigago Style (17a edizione)

Keen, Jeffrey S. Managing Systems Development. 2nd ed. Chichester [etc.]: John Wiley & Sons, 1987.

Citatione MLA (9a ed.)

Keen, Jeffrey S. Managing Systems Development. 2nd ed. John Wiley & Sons, 1987.