Greenwood, N. N.
Oxford Pergamon Press 1984,
Buku Referensi
Sutarti, Mursi
Jakarta PDII-LIPI 1994,
Buku Teks
Hein, Morris
"Monterey: Brooks Cole, 1984",
Buku Teks
Hill, John William, 1933-, author
Upper Saddle RIver Prentice Hall 1997,
Buku Teks
Stapf, Helmut
"Leipzig: Edition, 1967",
Buku Teks