• William Henry Leffingwell,
Making the office pay; tested office plans, methods, and systems that make for better results from everyday routine, A. W. Shaw Company, 1918. • William Henry Leffingwell,
The automatic letterwriter and dictation system, A. W. Shaw Company, 1919. • William Henry Leffingwell,
Office Management - Principles and Practice, London:
A. W. Shaw Company, 1925. • William Henry Leffingwell,
The Office Appliance Manual, National Association of Office Appliance Manufacturers, 1926. • William Henry Leffingwell,
A Textbook of Office Management. New York: McGraw-Hill Book Company Inc, 1932. • William Henry Leffingwell and Edwin Marshall Robinson,
Textbook of Office Management, New York:
McGraw-Hill, 1943. ==References==