Fowler, Robert Booth, author
University Press of Kansas, 1991
Buku Teks
Grande, Sandy, 1964-, author
Rowman and Littlefield, 2015
Buku Teks
Gettell, Raymond G.
Appleton-Century-Crofts, 1928
Buku Teks
Mason, Alpheus Thomas,1899-1989, author
Prentice-Hall, 1959
Buku Teks
Mason, Alpheus Thomas,1899-1989, author
Cornel University Press, 1955
Buku Teks