Pezzoli, Keith
MIT Press, 1998
Buku Teks
Hibben, Frank C.
Hill and Wang, 1960
Buku Teks
Adams, Robert McC.
ALdine Publishing Company, 1966
Buku Teks
Townsend, Camilla, author
Oxford University Press, 2017
eBooks
Griffiths, Brian, author
Praeger , 1972
Buku Teks