APA (7e ed.) Bronvermelding

SEKARAN UMA. (1992). RESEARCH METHODS FOR BUSINESS: A SKILL-BUILDING APPROACH (2ND.). JOHN WILEY AND SONS.

Chicago (17e ed.) Bronvermelding

SEKARAN UMA. RESEARCH METHODS FOR BUSINESS: A SKILL-BUILDING APPROACH. 2ND. NEW YORK: JOHN WILEY AND SONS, 1992.

MLA (9e ed.) Bronvermelding

SEKARAN UMA. RESEARCH METHODS FOR BUSINESS: A SKILL-BUILDING APPROACH. 2ND. JOHN WILEY AND SONS, 1992.