APA aipamena

Sobel, R. S. &. O. (2012). Understanding Economics (14th.). Cengage Learning.

Chicago Style aipamena

Sobel, Russell S. & Others. Understanding Economics. 14th. Canada: Cengage Learning, 2012.

MLA aipamena

Sobel, Russell S. & Others. Understanding Economics. 14th. Cengage Learning, 2012.