Millum, Trevor
University of Hull , 1994
Buku Teks
King, Victor T.
Komunitas Bambu, 2013
Buku Teks
Robinson, Danielm
Lonely Publications Pty Ltd, 2011
Buku Referensi
Mackinnon, John Ramsay
[publisher not identified], [date of publication not identified]
Buku Teks
Nieuwenhnis, Anton W.
Gramedia Pustaka Utama, 1994
Buku Teks