edited by Roy Harrod
Martin Press, 1965
Buku Teks
Magee, Stephen P.
Addison-Wesley , 1980
Buku Teks
Marcus, Edward, author
Pitman, 1965
Buku Teks
Chacholiades, Miltiades, author
McGraw-Hill, 1978
Buku Teks
Coppock, Joseph D., author
McGraw-Hill Book Company, Inc., 1962
Buku Teks