Giffin, W. C. (1971). Introduction to operations engineering. Richard D. Irwin, Inc.
Citazione stile Chigago Style (17a edizione)Giffin, Walter C. Introduction to Operations Engineering. Homewood, Illinois: Richard D. Irwin, Inc, 1971.
Citatione MLA (9a ed.)Giffin, Walter C. Introduction to Operations Engineering. Richard D. Irwin, Inc, 1971.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.