APA استشهاد

Gopalakrishnan, P., & Sandilya, M. S. (1978). Purchasing strategy: Text and cases.

استشهاد بنمط شيكاغو

Gopalakrishnan, P., و M S. Sandilya. Purchasing Strategy: Text and Cases. New delhi, Sterling, 1978.

MLA استشهاد

Gopalakrishnan, P., و M S. Sandilya. Purchasing Strategy: Text and Cases. 1978.