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Các thay đổi
* Jones Robert B., 1971, Thai Titles and Ranks, Including a Translation of Royal Lineage in Siam by King Chulalongkorn, Data Paper No. 81.
Ithaca: Southeast Asia Program, Department of Asian Studies, Cornell University
* Finestone Jeffrey, 1989, The Royal Family of Thailand:
The Descendants of King Chulalongkorn
* Rabibhadana M.R. Akin, 1996, The Organization of Thai Society in the Early Bangkok Period 1782 - 1873
* Foreign Correspondents' Club of Thailand, 2007, The King of Thailand in World Focus