Schryen, G. (2020). Anti-Spam Measures. Springer Berlin Heidelberg.
Trích dẫn kiểu ChicagoSchryen, Guido. Anti-Spam Measures. Springer Berlin Heidelberg, 2020.
MLA引文Schryen, Guido. Anti-Spam Measures. Springer Berlin Heidelberg, 2020.
警告：這些引文格式不一定是100％准確.