Holden, Robert
Laurence King Publishing, 1996
Buku Referensi
Made Wijaya
Archipelago Press, 1999
Buku Referensi
Hannebaun, Leroy
Reston Publishing, 1981
Buku Teks SO
Walker, Theodore D.
Van Nostrand Reinhold,, 1990
Buku Teks SO
Lyall, Sutherland
Thames and Hudson, 1991
Buku Teks SO