Brown, Dan
Auckland Doubleday, 2017
Buku Teks SO
Brown, Dan
Bantam Press, 2017
Buku Teks SO
Hewes, Gordon W.
Burgess Pub. Co., 1973
Buku Teks SO
Spirkin, A.G.
[Publisher not identified], [Date of publication not identified]
Buku Teks SO
Damisch, Hubert
MIT Press, 2000
Buku Teks SO