Citazione Stile APA (7a Edizione)

Gopalakrishnan, P. (2006). Purchasing and materials management. Tata McGraw-Hill.

Citazione stile Chigago Style (17a edizione)

Gopalakrishnan, P. Purchasing and Materials Management. New delhi.-: Tata McGraw-Hill, 2006.

Citatione MLA (9a ed.)

Gopalakrishnan, P. Purchasing and Materials Management. Tata McGraw-Hill, 2006.