APA (7th ed.) Citation

Twyford, H. B. (1921). Purchasing and storing. Industrial extension institute.

Chicago Style (17th ed.) Citation

Twyford, Harry Beaumont. Purchasing and Storing. New York: Industrial extension institute, 1921.

MLA (8th ed.) Citation

Twyford, Harry Beaumont. Purchasing and Storing. Industrial extension institute, 1921.