Constant, F. Woodbridge (Frank Woodbridge), 1904-
Addison-Wesley, 1967
Buku Teks
Harris, Myra A.
Prentice-Hall, 1997
Buku Teks
Larson, Kermit D.
Irwin, 1988
Buku Teks
Salle, A.J.
McGraw-Hill, 1961
Buku Teks
Tysor, H. James
Dallas: Banks Upshaw, 1953
Buku Teks