staff of Research and Education Association, Max Fogiel, director
California Research and Education Association, 1987
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
Melzak, Z.A., author
John Wiley & Sons, 1983
Buku Teks