Priyanto Wibowo
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2007
Buku Teks
Franklin, Benjamin
The Spencer Press, 1936
Buku Teks
Blundell, Nigel
Octopus Books Limited, 1980
Buku Teks
Hung, William
Harvard University Press, 1952
Buku Teks
McGraw-Hill, [date of publication not identified]
Buku Teks