Queen, Christopher S (2000). Engaged Buddhism in the West. Wisdom publications. p. 458. ISBN0-86171-159-9. OCLC41951145.
Prebish, Charles S.; Baumann, Martin (2002). Westward Dharma: Buddhism Beyond Asia. University of California Press. pp. 59, 111, 156, 159, 183, 186. ISBN0-520-22625-9. OCLC48871649.
Prebish, Charles S.; Kenneth Ken'ichi Tanaka (1998). The Faces of Buddhism in America. University of California Press. pp. 121–123. ISBN0-520-21301-7. OCLC37782936.