Pieper, Josef
Pantheon Books, 1955
Buku Teks
edited by Milton Fisk
Humanities Press, 1993
Buku Teks
Wang, Lv
China Renmin University Press, 2015
eBooks
Hubert, Charles I. (Charles Irving)
McGraw-Hill, 1969
Buku Teks
Schneiderman, Lawrence J.
Addison-Wesley, 1981
Buku Teks