Hardman, Michel L
Allyn and Bacon, 1987
Buku Teks
Robinson, Nancy M.
McGraw-Hill, 1976
Buku Teks
Oliver, Michael, 1945
Macmillan Press, 1996
Buku Teks
Harwintha Yuhria Anjarningsih, author
Sanga Sanga Grup, 2019
Buku Teks
S.C. (Sukarni Catur) Utami Munandar, author
Rineka Cipta, 2004
Buku Teks