Baumol, William J., author
Harper & Brother Publisher, 1954
Buku Teks
Seth, M.L., author
S. Chand, 1969
Buku Teks
Walker, E. Ronald, author
University of Chicago Press, 1947
Buku Teks
edited by J.P. Nieuwenhuysen and P.J. Drake
Melbourne Unversity Press, 1977
Buku Teks
Hansen, Alvin Harvey, 1887-1975, author
McGraw-Hill, 1947
Buku Teks