Smith, Daniel M., author
John Wiley & Sons, 1965
Buku Teks
Fredericks, Pierce, author
E.P. Dutton, 1960
Buku Teks
Freidel, Frank, author
McGraw-Hill, 1990
Buku Teks
Karp, Walter, author
Harper & Row, 1979
Buku Teks
Buchanan, Albert Russell, author
Harper & Row, 1964
Buku Teks