Lightstone, A. H., author
Appleton-Century-Crofts, 1969
Buku Teks
Pillis, John de, author
Holt, Rinehart and Winston, 1969
Buku Teks
Lawson, Terry, author
John Wiley & Sons, 1996
Buku Teks
Petersen, Peter, author
Springer, 2012
eBooks
White, Paul A., author
Dickenson, 1966
Buku Teks