Cita APA (7th ed.)

Johnson, P. F., & Flynn, A. E. (2015). Purchasing and supply management (Fifteenth edition.). McGraw-Hill Education.

Cita Chicago (17th ed.)

Johnson, P. Fraser, i Anna E. Flynn. Purchasing and Supply Management. Fifteenth edition. New York, NY: McGraw-Hill Education, 2015.

Cita MLA (9th ed.)

Johnson, P. Fraser, i Anna E. Flynn. Purchasing and Supply Management. Fifteenth edition. McGraw-Hill Education, 2015.