Gaya APA

Sekaran, U., Bougie, R. (). Research methods for business : a skiil- building approach (5 nd.ed). Amerika Serikat: Jhon Willey Sons.

Gaya MLA

Sekaran, Uma., Bougie, Roger. "Research methods for business : a skiil- building approach". 5 nd.ed Amerika Serikat: Jhon Willey Sons, . Text.