Hill, N. (1977). Success through positive mental attitude. Pocket book.
Cita Chicago Style (17a ed.)Hill, Napoleon. Success Through Positive Mental Attitude. New York: Pocket book, 1977.
Cita MLA (9a ed.)Hill, Napoleon. Success Through Positive Mental Attitude. Pocket book, 1977.
Precaución: Estas citas no son 100% exactas.