APA استشهاد

Webber, R. T., & Johnson, R. H. (1993). Buying and supplying quality. Tata McGraw Hill.

استشهاد بنمط شيكاغو

Webber, Richard T., و Ross H. Johnson. Buying and Supplying Quality. New Delhi: Tata McGraw Hill, 1993.

MLA استشهاد

Webber, Richard T., و Ross H. Johnson. Buying and Supplying Quality. Tata McGraw Hill, 1993.