"Thammanun kanpokkhrong ratcha-anachak phutthasakkarat song phan ha roi song" [ธรรมนูญการปกครองราชอาณาจักร พุทธศักราช ๒๕๐๒; "Charter for the Administration of the Kingdom, 2502 Buddhist Era (1959 Common Era)"], as published in the <i>Royal Thai Government Gazette</i> on 28 January 1959 CE.
Government of Thailand
1959-01-28
"<a rel="nofollow" class="external text" href="http://www.ratchakitcha.soc.go.th/DATA/PDF/2502/A/017/1.PDF">Thammanun kanpokkhrong ratcha-anachak phutthasakkarat song phan ha roi song</a>" ธรรมนูญการปกครองราชอาณาจักร พุทธศักราช ๒๕๐๒ [Charter for the Administration of the Kingdom, 2502 Buddhist Era (1959 Common Era)]. (1959, 28 January). <i>Royal Thai Government Gazette</i>. Volume 76, Part 17 A, Special Issue. pp. 1–8.