Govinda Tīrtha, S., & Omar Khayyam. (1941). The nectar of grace: ʻOmar Khayyām's life and works. Kitabistan.
Lua i Stíl Chicago (17ú heag.)Govinda Tīrtha, Swāmī, agus Omar Khayyam. The Nectar of Grace: ʻOmar Khayyām's Life and Works. Allahabad: Kitabistan, 1941.
Lua MLA (8ú heag.)Govinda Tīrtha, Swāmī, agus Omar Khayyam. The Nectar of Grace: ʻOmar Khayyām's Life and Works. Kitabistan, 1941.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.