Gaya APA

Samuelson, W, F., Marks, S, G. (2012). Managerial Economics (Seventh). America: Jhon Wiley & Sons, Inc.

Gaya MLA

Samuelson, William, F., Marks, Stephen, G.. "Managerial Economics". Seventh America: Jhon Wiley & Sons, Inc, 2012. Text.