MARSHALL P. (2001). HOW TO UNLOCK YOUR POTENTIAL. JAICO.
Cita Chicago (17th ed.)MARSHALL P. HOW TO UNLOCK YOUR POTENTIAL. MUMBAI: JAICO, 2001.
Cita MLA (9th ed.)MARSHALL P. HOW TO UNLOCK YOUR POTENTIAL. JAICO, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.