Sumich, James L., author
Wm.C. Brpwn, 1992
Buku Teks
Stanley, Melissa, author
Addison-Wesley, 1984
Buku Teks
by G.H. Haggis ... [et al.]
Longman, 1964
Buku Teks
Volpe, E. Peter (Erminio Peter), author
W.C. Brown, 1975
Buku Teks
Kimball, John W., author
Erlangga, 1991
Buku Teks