Levin, R. I., & Kirkpatrick, C. (1966). Planning and control with PERT/CPM. McGraw-Hill.
Dyfyniad Arddull ChicagoLevin, Richard I., and Charles Kirkpatrick. Planning and Control with PERT/CPM. New York: McGraw-Hill, 1966.
Dyfyniad MLALevin, Richard I., and Charles Kirkpatrick. Planning and Control with PERT/CPM. McGraw-Hill, 1966.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.