Holmes, Derek, author
Puslitbang Biologi, 1999
Buku Teks
Universitas Indonesia, 2004
UI - Skripsi (Membership)
Stefferud, Alfred, editor
United States. Government Printing Office, 1966
Buku Referensi
Kothari, Ashish
Universities Press, 2007
Buku Teks
Walters, Martin
Miles Kelly, 2000
Buku Referensi