Deborah R. McFarlane, editor
Jones & Bartlett Learning, 2015
Buku Teks
El-Sayed, Abdulrahman M.
Oxford University Press, 2017
eBooks
Heller, Richard F.
Oxford University Press, 2006
Buku Teks
Sauvy, Alfred
Basic Books, 1969
Buku Teks
Hansen, Morris H.
John Wiley & Sons, 1970
Buku Teks