Yogananda, Paramahansa
Moments of truth. Yogananda, Paramahansa; Donald J. Walters. Nevada City, Crystal Clarity Publishers, 1995. ISBN: 9781565897250.
"Reprint of the Philosophical Library 1946 first edition."
German translation: Paramahansa Yogananda interpretiert die Rubaijat des Omar Chajjam, 1996.