Toh 2020, hlm. 110. Toh, Boon Kwan (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.Parameter |s2cid= yang tidak diketahui akan diabaikan (bantuan)
Toh 2020, hlm. 109–110. Toh, Boon Kwan (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.Parameter |s2cid= yang tidak diketahui akan diabaikan (bantuan)