Blodgett, Ralp H., author
Rinehart, 1959
Buku Teks
Jones, N.S. Carey, author
The Syndics of the Cambridge Univ. Press, 1953
Buku Teks
Balaam, David N., 1950-, author
Pearson Education, 2014
Buku Teks
Balaam, David N., 1950-, author
Pearson/Prentice Hall, 2005
Buku Teks
Balaam, David N., 1950-, author
Prentice-Hall, 1996
Buku Teks