Polonsky, A. (2020). Sir Sigmund Sternberg: 2 June 1921-18 October 2016. Polin.
Chicago-Zitierstil (17. Ausg.)Polonsky, Antony. "Sir Sigmund Sternberg: 2 June 1921-18 October 2016." Polin 2020.
MLA-Zitierstil (8. Ausg.)Polonsky, Antony. "Sir Sigmund Sternberg: 2 June 1921-18 October 2016." Polin, 2020.
警告：这些引文格式不一定是100％准确.