Nungesser, M., & Roloff, S. (2001). When 6 is 9: By Stefan Roloff.
Chicago-Zitierstil (17. Ausg.)Nungesser, Michael, 与 Stefan Roloff. When 6 Is 9: By Stefan Roloff. Berlin, 2001.
MLA-Zitierstil (8. Ausg.)Nungesser, Michael, 与 Stefan Roloff. When 6 Is 9: By Stefan Roloff. 2001.
警告：这些引文格式不一定是100％准确.