Givens, C. J. (1993). SuperSelf: Doubling your personal effectiveness. Simon & Schuster.
Cita Chicago Style (17a ed.)Givens, Charles J. SuperSelf: Doubling Your Personal Effectiveness. New York: Simon & Schuster, 1993.
Cita MLA (9a ed.)Givens, Charles J. SuperSelf: Doubling Your Personal Effectiveness. Simon & Schuster, 1993.
Precaución: Estas citas no son 100% exactas.