Mathews, John Mabry
Appleton-Century Company, 1938
Buku Teks
Coates, Benjamin Allen, author
Oxford University Press, 2016
eBooks
Random House, 1965
Buku Teks
Oxford University Press, 1951
Buku Teks
edited by Frederick H. Hartman
McGraw-Hill, 1951
Buku Teks