APA (7e ed.) Bronvermelding

RIES, A. (1991). Harse sense: The key to success is.. McGraw-Hill.

Chicago (17e ed.) Bronvermelding

RIES, Al. Harse Sense: The Key to Success Is.. New York: McGraw-Hill, 1991.

MLA (9e ed.) Bronvermelding

RIES, Al. Harse Sense: The Key to Success Is.. McGraw-Hill, 1991.