Cita APA (7th ed.)
Current thought. Vskils, Ferrer and Simons Private.
Cita Chicago (17th ed.)
Current Thought. Bombay (India): Vskils, Ferrer and Simons Private.
Cita MLA (9th ed.)
Current Thought. Vskils, Ferrer and Simons Private.
Atenció: Aquestes cites poden no estar 100% correctes.