APA (7th ed.) Citation

England, W. B. (1967). The purchasing system / by W.B. England. Irwin.

Chicago Style (17th ed.) Citation

England, W. B. The Purchasing System / by W.B. England. Irwin, 1967.

MLA (9th ed.) Citation

England, W. B. The Purchasing System / by W.B. England. Irwin, 1967.

Warning: These citations may not always be 100% accurate.