Omar Khayyam, Graves, R., & Ali-Shah, O. (1972). Rubaiyyat of Omar Khayaam: : a new translation with critical commentaries by Robert Graves and Omar Ali-Shah. Penguin.
Cita Chicago Style (17a ed.)Omar Khayyam, Robert Graves, y Omar Ali-Shah. Rubaiyyat of Omar Khayaam: : A New Translation with Critical Commentaries by Robert Graves and Omar Ali-Shah. Harmondsworth: Penguin, 1972.
Cita MLA (8a ed.)Omar Khayyam, et al. Rubaiyyat of Omar Khayaam: : A New Translation with Critical Commentaries by Robert Graves and Omar Ali-Shah. Penguin, 1972.
Precaución: Estas citas no son 100% exactas.