edited by David Coady
Ashage, 2006
Buku Teks
Mols, Gerardus Petrus marcus Franciscus
Gouda Quint, 1982
Buku Teks
Reamer, Frederic G., author
Columbia University Press, 1993
Buku Teks
Barnes, Winston H. F., author
Adam & Charles Black, 1950
Buku Teks
Langer, Susanne K., author
John Hopkins Press, 1964
Buku Teks