Robequain, C., & Laborde, E. (1958). Malaya, Indonesia, Borneo, and the Philippines: A geographical, economic, and political description of Malaya, the East Indies, and the Philippines ([2nd ed.].). Longmans Green and Co.

Robequain, Charles, and E.D Laborde. Malaya, Indonesia, Borneo, and the Philippines: A Geographical, Economic, and Political Description of Malaya, the East Indies, and the Philippines. [2nd ed.]. London: Longmans Green and Co, 1958.

Robequain, Charles, and E.D Laborde. Malaya, Indonesia, Borneo, and the Philippines: A Geographical, Economic, and Political Description of Malaya, the East Indies, and the Philippines. [2nd ed.]. Longmans Green and Co, 1958.