Lenczowski, George
Cornell University Press, 1956
Buku Teks
Sloan, A
Hutchinson , 1924
Buku Teks
Ochsenwald, William
McGraw-Hill, 2011
Buku Teks
Fisher, Sydney Nettleton
Routledge & Kegan Paul, 1959
Buku Teks
Thayer, Philip W.
Johns Hopkins Press, 1958
Buku Teks