edited by Joseph F. McCloskey, Florence N. Trefethen
John Hopkins Press, 1954
Buku Teks SO
Satyanarayana, M.
Himalaya Publ. House, 1980
Buku Teks SO
Enrick, Norbert Lloyd
New York, N.Y., Holt
Buku Teks SO
Gupta
S.CHAND & COMPANY LTD., 1979
Buku Teks SO
Sri Mulyono
Lembaga Penerbit Fakultas Ekonomi Universitas Indonesia, 1991
Buku Teks SO