Corwin, Edward S., author
United States of America, 1960
Buku Teks
Corwin, Edward S., author
Holt, Rinehart and Winston, 1966
Buku Teks
Scott, Frank R
University of Toronto Press, 1977
Buku Teks
Corwin, Edward S., author
Holt, Rinehart and Winston, 1964
Buku Teks
Scaros, Constantinos E., author
Jones and Bartlett Publishers, 2011
Buku Teks