Willard, Hobart H. (Hobart Hurd), 1881-1974, author
D. Van Nostrand, 1956
Buku Teks
Brumblay, Ray U.
Barnes & Noble, 1964
Buku Teks
Blaedel, W.J., author
Harper & Row, 1963
Buku Teks
Wiig, Edwin O.
D.Van Nostrand Company, 1954
Buku Teks
Day, R.A., author
Erlangga, 1986
Buku Teks