APA-viite

Gopalakrishnan, P. (1990). Purchasing and materials management. Tata Mc Graw -Hill Publishing Company Limited.

Chicago-tyylinen lähdeviittaus

Gopalakrishnan, P. Purchasing and Materials Management. New Delhi: Tata Mc Graw -Hill Publishing Company Limited, 1990.

MLA-viite

Gopalakrishnan, P. Purchasing and Materials Management. Tata Mc Graw -Hill Publishing Company Limited, 1990.