Sherman, Stuart P., author
Charles Scribner's Sons, 1923
Buku Teks
Duke, James A., author
CRC Press, Taylor & Francis Group, 2009
Buku Referensi
edited by Walter G. Driscoll
McGraw-Hill, 1978
Buku Referensi
Weadh, Robert C
Harvard University Press, 1966
Buku Teks
Wang
Buku Referensi