Macmillan, 1937, 1949
Buku Teks
edited by John L. Bradley and Martin Stevens
Rinehart and Winston, 1968
Buku Teks
Watt, William W. (William Whyte), author
Holt, Rinehart and Winston, 1961
Koleksi Publik
Watt, William W. (William Whyte), author
Holt, Rinehart and Winston, 1961
Koleksi Publik
edited by Richard S. Beal and Jacob Korg
Prentice-Hall, 1962
Buku Teks