Cavalier, R. (1990). PLATO FOR BEGINNERS. Orient Longman Private Limited.
Cita Chicago (17th ed.)Cavalier, Robert. PLATO FOR BEGINNERS. Hyderabad: Orient Longman Private Limited, 1990.
Cita MLA (9th ed.)Cavalier, Robert. PLATO FOR BEGINNERS. Orient Longman Private Limited, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.