Gupta
S.CHAND & COMPANY LTD., 1979
Buku Teks SO
Sri Mulyono
Lembaga Penerbit Fakultas Ekonomi Universitas Indonesia, 1991
Buku Teks SO
Churchill, Gilbert A.
The Dryden Press, 1995
Buku Teks SO
Churchill, Gilbert A.
Thomson, 2005
Buku Teks
edited by James A. Aderson and Edward Rosenfeld
MIT Press, 1990
Buku Referensi