Παραπομπή APA

Internastional Labour Office. (1974). Introduction to work study/2e (2nd ed.). International labour office.

Παραπομπή Chicago Style

Internastional Labour Office. Introduction to Work Study/2e. 2nd ed. Geneva: International labour office, 1974.

Παραπομπή MLA

Internastional Labour Office. Introduction to Work Study/2e. 2nd ed. International labour office, 1974.