edited by Wolfram F. Hanrieder
Westview Press, 1986
Buku Teks
Prentice-Hall, 1964
Buku Teks
Frederick, William C., 1925-, author
McGraw-Hill, 1992
Buku Teks
Frederick, William C., 1925-, author
McGraw-Hill, 1988
Buku Teks
Clarendon Press, 1971
Buku Teks