Παραπομπή σε μορφή APA (7η εκδ.)

Bowen, H. R., & Douglass, G. K. (1971). Efficiency in liberal education: A study of comparative instructional costs for different ways of organizing teaching-learning in a liberal arts college. McGraw-Hill Book.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Bowen, Howard R., και Gordon K. Douglass. Efficiency in Liberal Education: A Study of Comparative Instructional Costs for Different Ways of Organizing Teaching-learning in a Liberal Arts College. New York: McGraw-Hill Book, 1971.

Παραπομπή σε μορφή MLA (8th εκδ.)

Bowen, Howard R., και Gordon K. Douglass. Efficiency in Liberal Education: A Study of Comparative Instructional Costs for Different Ways of Organizing Teaching-learning in a Liberal Arts College. McGraw-Hill Book, 1971.