Chú thích Cội_Bồ-đề

  1. 1 2 Gethin, Rupert (1998). The Foundations of Buddhism. Oxford University Press. tr. 22. ISBN 9780192892232. 
  2. ↑ Simon Gardner, Pindar Sidisunthorn and Lai Ee May, 2011. Heritage Trees of Penang. Penang: Areca Books. ISBN 978-967-57190-6-6