Harrison, Brian, author
MacMillan & Co., 1957
Buku Teks
Harrison, Brian, author
Macmillan, 1955
Buku Teks
Clyde, Paul H. (Paul Hibbert), author
Prentice-Hall, [date of publication not identified]
Buku Teks
Pluvier, Jan M., author
Oxford University Press, 1977
Buku Teks
Michael, Franz, author
Henry Holt and Co., 1956
Buku Teks