Howes, John
Wetlands International, 2005
Buku Referensi
McClure, H. Elliott (Howe Elliott), 1910-, author
Applied Scientific Research Corporation, [date of publication not identified]
Buku Referensi
Sobel, Michael I., author
University of Chicago, 1987
Buku Teks
Lima-de-Faria, Antonio, author
[, Springer], 2012
eBooks
Martin, Graham R.
Oxford University Press, 2017
eBooks