Cita APA (7a ed.)

England, W. B., & Leenders, M. R. (1975). Purchasing and materials management (6th. ed.). Richard D. Irwin.

Cita Chicago Style (17a ed.)

England, Wilbur B., y Michiel R. Leenders. Purchasing and Materials Management. 6th. ed. Homewood, Ill.: Richard D. Irwin, 1975.

Cita MLA (8a ed.)

England, Wilbur B., y Michiel R. Leenders. Purchasing and Materials Management. 6th. ed. Richard D. Irwin, 1975.