APA (7e ed.) Bronvermelding
Hill, N. (1977). Success through a positive mental attitude. A Kangaroo book.
Chicago (17e ed.) Bronvermelding
Hill, Napoleon. Success Through a Positive Mental Attitude. New York: A Kangaroo book, 1977.
MLA (9e ed.) Bronvermelding
Hill, Napoleon. Success Through a Positive Mental Attitude. A Kangaroo book, 1977.
Let op: Deze citaties zijn niet altijd 100% accuraat.