Barney, Jay B.
Houghton Miffiln, 1992
Buku Teks
Edwards, Ronald S., author
Macmillan, 1961
Buku Teks
Honour, T. F., author
Bina Aksara, 1982
Buku Teks
Weske, Mathias, author
[, Springer-Verlag], 2012
eBooks
Williamson, Oliver E., author
Prentice-Hall, 1970
Buku Teks