Heyel, C. (1972). Handbook of modern office management and administrative services. McGraw-Hill.
Chicago Style (17. basım) AtıfHeyel, Carl. Handbook of Modern Office Management and Administrative Services. New York: McGraw-Hill, 1972.
MLA (9th ed.) AtıfHeyel, Carl. Handbook of Modern Office Management and Administrative Services. McGraw-Hill, 1972.
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