APA (7e ed.) Bronvermelding

Zikmund, W. G. (2013). Business research methods (9th ed.). South-western cengage learning.

Chicago (17e ed.) Bronvermelding

Zikmund, William G. Business Research Methods. 9th ed. Andover: South-western cengage learning, 2013.

MLA (8e ed.) Bronvermelding

Zikmund, William G. Business Research Methods. 9th ed. South-western cengage learning, 2013.