Byars, Llyod L., author
Richard D. Irwin, 1984
Buku Teks
Yeh, Stephen H.K., author
UNESCO, 1990
Buku Teks
Carrell, Michael R., author
Macmillan, 1992
Buku Teks
by Herbert G. Henemen III ... [et.al.]
Richard D. Irwin, 1989
Buku Teks
Riskha Ariane Badri
2012
UI - Tesis Open