APA-referens (7:e uppl.)

Levin, R. (1977). Planning and control with PERTCPM. Tata McGraw Hill.

Chicago-referens (17:e uppl.)

Levin, Richard. Planning and Control with PERTCPM. New Delhi: Tata McGraw Hill, 1977.

MLA-referens (9:e uppl.)

Levin, Richard. Planning and Control with PERTCPM. Tata McGraw Hill, 1977.