Voris, William, author
Richard D. Irwin, 1956
Buku Teks
edited by Zhongqi He, Robert Larkin and Wayne Honeycutt
Springer, 2012
eBooks
editor, Monique Lamers, Peter de Swart
Springer, 2012
eBooks
Artikel Jurnal
WooJin Kim, author
Graduate School of Economics Kyoto University, 2013
Artikel Jurnal