White, Edward T.
Florida University, [19?-]
Buku Teks
Ramsey, Charles George, 1884-1963
John Wiley & Sons, 2000
Buku Teks
Ramsey
John Wiley & Sons, 1994
Buku Referensi
edited by Joseph N. Boaz
John Wiley & Sons, 1970
Buku Referensi
Laseau, Paul
John Wiley & Sons, 2001
Buku Teks