Citazione Stile APA (7a Edizione)

(1970). Executive programs and operating systems. Elsevier Publishing, Inc.

Citazione stile Chigago Style (17a edizione)

Executive Programs and Operating Systems. New York: Elsevier Publishing, Inc, 1970.

Citatione MLA (9a ed.)

Executive Programs and Operating Systems. Elsevier Publishing, Inc, 1970.