Daykin, C.D.
Chapman & Hall, 1994
Buku Teks
Willett, Allan H.
University of Pennsylvania Press, 1951
Buku Teks
Hammond, J.D.
Foresman and Company, 1968
Buku Teks
Murphy, David
Chapman & Hall/CRC, 2008
Buku Teks
Seal, Hilary L.
John Wiley & Sons, 1978
Buku Teks