Harris, O. Jeff. Jr.
John Wiley & Sons, 1977
Buku Teks
Nicholson, John, author
BBC Books , 1992
Buku Teks
Cooper, Alfred M., author
McGraw-Hill, 1952
Buku Teks
Liebler, Joan Gratto, author
Jones & Bartlett Learning, 2012
Buku Teks
Dailey, Charles Alvin, 1923-, author
Parker, 1970
Buku Teks