Douglas, William O., author
Princeton University Press, 1960
Buku Teks
Douglas, William O., author
Princeton University Press , 1960
Buku Teks
Maisel, Albert Q.
Thomas Nelson , 1957
Buku Teks
Lerner, Max, author
Simon and Schuster, 1957
Buku Teks
Brzenzunski, Zbigniew
Greenwood Press, 1970
Buku Teks