Wright, Elizabeth, 1926-2000, author
Routledge, 1984
Buku Teks
Munroe, Ruth L., author
Dryden Press, 1955
Buku Teks
Holland, Norman Norwood, author
Oxford Universiy Press, 1990
Buku Referensi
Dieter Lohmar
Springer Science, 2012
eBooks
Clarke, Graham S., author
Routledge, 2006
Buku Teks