Frederick, William H. In Memoriam: Sutomo(PDF). Indonesia (Cornell Modern Indonesia Project). April 1982, 33: 127–128 [2021-08-18]. seap.indo/1107016901. (原始内容存档于2017-11-21).
Frederick, William H. In Memoriam: Sutomo(PDF). Indonesia (Cornell Modern Indonesia Project). April 1982, 33: 127–128 [2021-08-18]. seap.indo/1107016901. (原始内容存档于2017-11-21).