Toh 2020, p. 110. Toh, Boon Kwan (May 2020). "Black and Silver: Perceptions and Memories of the B-29 Bomber, American Strategic Bombing and the Longest Bombing Missions of the Second World War on Singapore". War & Society. 39 (2): 109–125. doi:10.1080/07292473.2020.1741773. S2CID221054765.
Toh 2020, pp. 109–110. Toh, Boon Kwan (May 2020). "Black and Silver: Perceptions and Memories of the B-29 Bomber, American Strategic Bombing and the Longest Bombing Missions of the Second World War on Singapore". War & Society. 39 (2): 109–125. doi:10.1080/07292473.2020.1741773. S2CID221054765.
O'Connell 2017, p. 44. O'Connell, John F. (Spring 2017). "What Might Have Been – XX Bomber Command's B-29 Offensive against Japanese Oil Supplies in The Netherlands East Indies and Borneo". Air Power History. 64 (1): 41–46. JSTOR26276841.
Toh 2020, p. 110. Toh, Boon Kwan (May 2020). "Black and Silver: Perceptions and Memories of the B-29 Bomber, American Strategic Bombing and the Longest Bombing Missions of the Second World War on Singapore". War & Society. 39 (2): 109–125. doi:10.1080/07292473.2020.1741773. S2CID221054765.
Toh 2020, pp. 109–110. Toh, Boon Kwan (May 2020). "Black and Silver: Perceptions and Memories of the B-29 Bomber, American Strategic Bombing and the Longest Bombing Missions of the Second World War on Singapore". War & Society. 39 (2): 109–125. doi:10.1080/07292473.2020.1741773. S2CID221054765.