APA Citatie

Brown, M. P. a., England wilbur B, & Mathews John B. (1961). Problems in marketing/3e (3rd ed.). McGraw Hill.

Chicago Style citaat

Brown, MIlton P...[et al.], England wilbur B, en Mathews John B. Problems in Marketing/3e. 3rd ed. New York: McGraw Hill, 1961.

MLA citatie

Brown, MIlton P...[et al.], et al. Problems in Marketing/3e. 3rd ed. McGraw Hill, 1961.