Altieri, Miguel A.
Westview Press, 1987
Buku Teks
edited by W. Bruce Campbell and Silvia Lopez Ortiz
Springer, 2012
eBooks
Anik Pratiwi
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2020
UI - Tesis (Membership)
Vasey, Daniel E.
Iowa State University Press, 1992
Buku Teks
Ahmad Syarif
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2014
UI - Tesis (Membership)