Hougen, Olaf A., author
John Wiley & Sons, 1960
Buku Teks
Pugh, Emerson M.
Addison-Wesley Pub. Co., 1960
Buku Teks
Robbins, Sydney M.
Houghton Miffiln, 1954
Buku Teks
Cooley, Thomas M.
Little, Brown and Company, 1898
Buku Teks
Noll, Edward M.
Howard W. Sams, , 1978
Buku Teks