Gaya APA

Sekaran,Uma, ., Bougie, R. (2013). Research methods for business: a skill-building approach (Ed. 6). USA: Jhon Wiley & Sons, Inc.

Gaya MLA

Sekaran,Uma, ., Bougie, Roger. "Research methods for business: a skill-building approach". Ed. 6 USA: Jhon Wiley & Sons, Inc, 2013. Text.