Gaya APA

Wooldridge, J, M. (2016). Introductory Econometrics : a modern approach, 6th Ed (6th. Ed). USA: Cengage Learning.

Gaya MLA

Wooldridge, Jeffrey, M. "Introductory Econometrics : a modern approach, 6th Ed". 6th. Ed USA: Cengage Learning, 2016. Text.