Roberts, Edgar V., author
Prentice-Hall, 1969
Buku Teks
Roberts, Edgar V., author
Prentice-Hall, 1977
Koleksi Publik
Headrick, Paul, 1957-, author
Wiley-Blackwell, 2014
Buku Teks
Barnet, Sylvan, author
Batsford Academic and Educational, 1985
Buku Teks
Messenger, William E., author
Prentice-Hall, 1989
Buku Teks