Molony, Barbara, author
CO Westview Press, 2016
Buku Teks
Yale, William, author
The University of Michigan Press, 1958
Buku Teks
Peffer, Nathaniel, author
University of Michigan Press, 1958
Buku Teks
Vinacke, Harold M., author
Appleton-Century-Crofts, 1950
Buku Teks
Vinache, Harold M., author
George Allen and Unwin, 1950
Buku Teks