Woronoff, Jon
Macmillan, 1996
Buku Teks
edited by Gianni Fodella
Bocconi University, 1975
Buku Teks
editor, Heide and Udo ernst Simonis
Otto Harrassowitz - Wiebaden , 1974
Buku Teks
Paul Norbury , 1983
Buku Teks
edited by Ryutaro Komiya ; transleted by Robert S. Ozaki
University of California Press, 1966
Buku Teks