edited by John L. Gittleman
Comstock , 1989
Buku Teks
Richardson, W. Norman
Macmillan, 1976
Buku Teks
Jiggins, Chris D.
Oxford University Press, 2017
eBooks
edited by Peter Moore, R.J. Berry and A. Hallam
Grolier International, 1993
Buku Referensi
edited by Ralph Ludwig, Peter Mühlhäusler and Steve Pagel
Cambridge University Press, 2019
Buku Teks