Selvin, Steve
Oxford University Press , 1991
Buku Teks
by M.J. Crowder ... [et al.]
Chapman & Hall, 1991
Buku Teks
editor, Eric Reid
Ellis Horwood, 1981
Buku Referensi
Lee, Elisa T., author
John Wiley & Sons, 1992
Buku Teks
M. Angela A. Meireles, editor
CRC Press, Taylor & Francis Group, 2009
Buku Teks