DOBLER, D. W., LEE, L., & BURT, D. N. (1984). Purchasing and materials management: Text and cases.--Ed. 4. McGraw-Hill Book Company.

DOBLER, Donald W., Lamar LEE, and David N. BURT. Purchasing and Materials Management: Text and Cases.--Ed. 4. New York: McGraw-Hill Book Company, 1984.

DOBLER, Donald W., et al. Purchasing and Materials Management: Text and Cases.--Ed. 4. McGraw-Hill Book Company, 1984.