APA
Omar Khayyam, Fitzgerald E., Allen E. H. 1., Whinfield E. H., Nicolas J. B. (. B. & Arnot R. (2012). The sufistic quatrains of Omar Khayyam in definitive form. New Delhi: Cosmo Publications.
Chicago
Omar Khayyam, Fitzgerald Edward, Allen Edward Heron 1861, Whinfield E H, Nicolas J B (Jean Baptiste) and Arnot Robert. 2012. The sufistic quatrains of Omar Khayyam in definitive form. New Delhi: Cosmo Publications.
Harvard
Omar Khayyam, Fitzgerald E., Allen E. H. 1., Whinfield E. H., Nicolas J. B. (. B. and Arnot R. (2012). The sufistic quatrains of Omar Khayyam in definitive form. New Delhi: Cosmo Publications.
MLA
Omar Khayyam, Fitzgerald Edward, Allen Edward Heron 1861, Whinfield E H, Nicolas J B (Jean Baptiste) and Arnot Robert. The sufistic quatrains of Omar Khayyam in definitive form. New Delhi: Cosmo Publications. 2012.