George Mc.T Kahin (1980). “In Memoriam: Mohammad Hatta (1902–1980)”. Indonesia. Southeast Asia Program Publications at Cornell University. 20 (20): 113–120. doi:10.2307/3350997. JSTOR3350997.
George Mc.T Kahin (1980). “In Memoriam: Mohammad Hatta (1902–1980)”. Indonesia. Southeast Asia Program Publications at Cornell University. 20 (20): 113–120. doi:10.2307/3350997. JSTOR3350997.