^Donald Swearer (2003), Buddhism in the Modern World: Adaptations of an Ancient Tradition (Editors: Heine and Prebish), Oxford University Press, ISBN978-0195146981, pages 9-25
^Karel Werner (1995), Love Divine: Studies in Bhakti and Devotional Mysticism, Routledge, ISBN978-0700702350, pages 45-46
^Karunaratna, Indumathie (2000). "Devotion". In Malalasekera, Gunapala Piyasena. Encyclopaedia of Buddhism. IV. Government of Ceylon. p. 435.