Moise, Edwin E.
Addison-Wesley , 1964
Buku Teks
Travers, Kenneth J., author
Laidlaw Brothers, 1987
Buku Teks
Brumfiel, Charles Francis, 1914-, author
Addison-Wesley, 1962
Buku Teks
Jurgensen, Ray C., author
Houghton-Miffiln, 1983
Buku Teks
Keedy, Mervin L., author
Addison-Wesley Pub. Co. , 1965
Buku Teks