Prince, Robert, author
Springer, 2012
eBooks
Jamie V. Trapp, Tomas Kron, editor
Taylor & Francis Group, 2008
Buku Teks
Frankel, Robert, author
John Wiley & Sons, 1976
Buku Teks
Addison-Wesley Publishing Company, Inc., 1958
Buku Teks
Thomson, John F.
Reinhold Publ., 1962
Buku Teks