Dott, Robert H.
McGraw-Hill, 1988
Buku Teks
Miner, Earl, author
Stanford University Press, 1968
Buku Teks
Wagoner, Robert H.
John Wiley & Sons, 1996
Buku Teks
Fuson, Robert H.
Kendall/Hunt Publishing Co., 1977
Buku Teks
Greenwood Press, 1976
Buku Teks