Young, Robert, 1950-, author
UK Malden, MA John Wiley & Sons, Inc., 2016
Buku Teks
Stott, Philip
Allen & Unwin, 1981
Buku Referensi
Losee, John, author
Oxford University Press, 1980
Buku Teks
Thody, Philip, author
Routledge , 1997
Buku Teks
Moore, Raymond C., author
McGraw-Hill, 1958
Buku Teks