Dyke, Vernon van, author
Nelson, 1992
Buku Teks
Sederberg, Peter C.
Chandler & Sharp Publishers, 1977
Buku Teks
Ethridge, Marcus E., author
Wadsworth, 2010
Buku Teks
Lipson, Leslie, author
Prentice-Hall, 1954
Buku Teks
Friedmann, Wolfgang, 1907-1972, author
W. Van Hoeve, 1954
Buku Teks