Royal, B. (2017). Power thinking (3rd impression.). Jaico Publishing, Mumbai.
Cita Chicago (17th ed.)Royal, Brandon. Power Thinking. 3rd impression. Jaico Publishing, Mumbai, 2017.
Cita MLA (9th ed.)Royal, Brandon. Power Thinking. 3rd impression. Jaico Publishing, Mumbai, 2017.
Atenció: Aquestes cites poden no estar 100% correctes.