Moulton, Harold G., author
University of Chicago Press, 1922
Buku Teks
Gerstenberg, Charles W., author
Prentice-Hall, 1959
Buku Teks
Gerstenberg, Charles W., author
Prentice-Hall, 1951
Buku Teks
Gerstenberg, Charles W., author
Prentice-Hall, 1956
Buku Teks
Zand, Dale E., author
McGraw-Hill, 1981
Buku Teks