Bowen, H. R., & Douglas, 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.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBowen, Howard Rothmann, और Gordon K. Douglas. 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, 1971.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBowen, Howard Rothmann, और Gordon K. Douglas. Efficiency in Liberal Education: A Study of Comparative Instructional Costs for Different Ways of Organizing Teaching-learning in a Liberal Arts College. McGraw-Hill, 1971.
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