edited by Vergilius Ferm
Littlefield, Adams & Co., 1961
Buku Teks
Cassey, Edward S
The university of California press, 1997
Buku Teks
Cassey, Edward S.
University of California Press, 1983
Buku Teks
Cohen, Martin, author
Blackwell Publishing, 2008
Buku Teks
Stumpf, Samuel Enoch, 1918- 1998, author
McGraw-Hill, 1999
Buku Teks