Groom, Winston, author
Pocket Books, 1995
Buku Teks
Böll, Heinrich, author
Verlag Hans Bredow-Institut, 1958
Buku Teks
Smith, Wilbur, author
Pan Bookes, 1990
Buku Teks
Easterbrook, Don J.
McGraw-Hill, 1969
Buku Teks
Patinkin, Don
Harper & Row, Publishers, 1972
Buku Teks