罗杰·希尔斯曼(原始内容存档于2020-11-12). Roger Hilsman, Department of State, Bureau of Intelligence and Research, Research Memorandum, RFE-27, June 18, 1962, "Progress Report
1909年英国—暹罗条约保护国。后来,四个州与柔佛州一道,成为了马来属邦。 拉玛五世 U.S. Department of State, Bureau of Intelligence and Research, Office of the Geographer, "International Boundary Study: