Auburn House Publ., 1982
Buku Teks
edited by Walter W. Holland and Susie Gilderdale
Henry Kimpton, 1977
Buku Teks
American Enterprise Institute for Public Policy Research, 1986
Buku Teks
Birenbaum, Arnold, author
Allanheld, Osmun, 1981
Buku Teks
edited by Rosalind S. Miller, and Helen Rehr
Prentice-Hall, 1983
Buku Teks