Hoel, Paul Gerhard, 1905-
John Wiley & Sons, 1962
Buku Teks
Hansen, Kermit O.
Prentice-Hall, 1955
Buku Teks
Andrews, Frank M.
University of Michigan, 1981
Buku Teks
Krieg, Eric J.
Pearson, 2014
Buku Teks
Klecka, William R.
Mc-Graw-Hill , 1975
Buku Teks