Rujukan Navaratna

  1. ↑ Richard Brown (2007). Mangala Navaratna (page 1). Hrisikesh Ltd. ISBN 974-07-1853-1. 
  2. ↑ "Reference Thai Government". Dicapai 2009-08-28. 
  3. ↑ "How to wear navaratna". Dicapai 2010-05-17. 
  4. ↑ Richard Brown (2007). Mangala Navaratna. Hrisikesh Ltd. m/s. 1–2. ISBN 974-07-1853-1. 
  5. ↑ Richard S. Brown (1995). Ancient Astrological Gemstones & Talismans. AGT Ltd. m/s. 47. ISBN 974-89022-4-2. 
  6. ↑ Richard Brown (2007). Mangala Navaratna. Hrisikesh Ltd. m/s. 2. ISBN 974-07-1853-1. 
  7. ↑ Bangkok Gems & Jewellery Magazine (1993). A New Addition to the Crown Jewels of Thailand. BGJ Bangkok. 
  8. ↑ Richard S. Brown (2008). Ancient Astrological Gemstones & Talismans (edisi 2nd). Hrisikesh Ltd. m/s. 33, 51. ISBN 978-974-8102-29-0. 
  9. ↑ Harish Johari (1982). The Healing Power of Gemstones. Destiny Books. m/s. 35. ISBN 0-89281-215-X. 
  10. ↑ Howard Beckman (2000). Vibrational Healing With Gems. Balaji Publisher. ISBN 81-212-0704-5.