Dorland, W. A. Newman
W.B. Saunders Company , 1994
Buku Referensi
Cook, Margaret G., author
The H.W. Wilson Company, 1963
Buku Teks
Stern, David, author
Chandos, 2013
eBooks
George Routledge and Sons, 1969
Buku Referensi
George Routledge and Sons, 1969
Buku Referensi