Beckett, Kenneth A., author
Grolier International, 1984
Buku Referensi
Warren, William, author
Thames and Hudson, 1997
Buku Referensi
Patnaik, Naveen
Aquarian, 1994.
Buku Teks
Vermeulen, Nico
Rebo , 1998
Buku Referensi
Bell, Peter Robert, author
Dioscorides Press , 1992
Buku Teks