APA (7th ed.) Citation

Heyel, C. (1939). Human-relations manual for executives (1. ed., 5. impr.). McGraw-Hill.

Chicago Style (17th ed.) Citation

Heyel, Carl. Human-relations Manual for Executives. 1. ed., 5. impr. New York [u.a.]: McGraw-Hill, 1939.

MLA (9th ed.) Citation

Heyel, Carl. Human-relations Manual for Executives. 1. ed., 5. impr. McGraw-Hill, 1939.