Crumb, C. V. (1970). Training people effectively: The teaching manual for instructors and supervisors in business, education, industry and the professions. Lefax Pub.
Citazione stile Chigago Style (17a edizione)Crumb, Charles V. Training People Effectively: The Teaching Manual for Instructors and Supervisors in Business, Education, Industry and the Professions. Philadelphia, Pa: Lefax Pub, 1970.
Citatione MLA (9a ed.)Crumb, Charles V. Training People Effectively: The Teaching Manual for Instructors and Supervisors in Business, Education, Industry and the Professions. Lefax Pub, 1970.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.