oleh J. Basset [and others]
EGC, 1994
Buku Teks
editor, Robert F. Doerge; penerjemah, Achmad Mustofa Fatah
IKIP semarang, 1982
Buku Teks
Vogel, Arthur I., author
Longman, 1983
Buku Teks
Caret, Robert L., author
Wm. C. Brown, 1993
Buku Teks
Tyree, S. Young, author
Macmillan, 1961
Buku Teks