Sibley, J.F., author
Aslib, 1991
Buku Referensi
White, A. Blanco
Sweet and Maxwell, 1970
Buku Teks
Cornish, W.R. (William Rodolph), 1937-, author
Sweet and Maxwell, 2007
Buku Referensi
Meinhardt, Peter, author
Gower Press, 1971
Buku Teks
Goh, Tianwah, author
Rank Books, 1991
Buku Teks