Cita APA (7a ed.)

England, W. B., & Leenders, M. R. Purchasing and Materials management. Richard D. IP Win inc.

Cita Chicago Style (17a ed.)

England, Wilbur B., y Michael R. Leenders. Purchasing and Materials Management. Bombay.-: Richard D. IP Win inc.

Cita MLA (9a ed.)

England, Wilbur B., y Michael R. Leenders. Purchasing and Materials Management. Richard D. IP Win inc.