APA引文

Helle, H. J. (2012). Messages from Georg Simmel. Brill.

Chicago Style (17th ed.) Citation

Helle, Horst Jürgen. Messages from Georg Simmel. Leiden ; Boston: Brill, 2012.

MLA引文

Helle, Horst Jürgen. Messages from Georg Simmel. Brill, 2012.

警告：這些引文格式不一定是100％准確.