Cotton, F. Albert, author
John Wiley & Sons, 1995
Buku Teks
Jolly, William L., author
McGraw-Hill, 1984
Buku Teks
Longman, 1961
Buku Teks
Jolly, William L., author
Prentice-Hall, 1960
Buku Teks
Gilrearth, Esmarch S., author
McGraw-Hill, 1958
Buku Teks