APA (7e ed.) Bronvermelding

Johnson, P. F. (2020). Purchasing and supply management (Sixteenth edition.). McGraw-Hill Education.

Chicago (17e ed.) Bronvermelding

Johnson, P. Fraser. Purchasing and Supply Management. Sixteenth edition. New York, NY: McGraw-Hill Education, 2020.

MLA (9e ed.) Bronvermelding

Johnson, P. Fraser. Purchasing and Supply Management. Sixteenth edition. McGraw-Hill Education, 2020.