Lial, Margareth L., author
Scott, Foresman, 1979
Buku Teks
Rommen, Heinrich A.
Liberty Fund Indianapolis, 1998
Buku Teks
Rotterdam University Press, 1974
Buku Teks
editors, John Stanturf, David Lamb, Palle Madsen
Springer Science, 2012
eBooks
Lial, Margaret L., author
Harper Colins, 1995
Buku Teks