Kuh, Edwin
North-Holland Publishing, 1973
Buku Teks SO
editors, H.S.W. Massey, E.W. McDaniel, Benjamin Bederson
Academic Press, 1982
Buku Teks SO
Roberts, A.
Pergamon Press, 1981
Buku Teks
Parkin, Michael, 1939-
Prentice-Hall, c1992
Buku Referensi
Morley, Samuel A.
The Dryden Press, 1984
Buku Teks