Gaya APA
JONES, M., JONES, G.
(2002).
BIOLOGY FOR IGCSE AND 0 LEVEL INTERNATIONAL EDITION
.
CHAMPAIGN:
Chelsea House.
Gaya MLA
JONES, MARY., JONES, GEOFF.
"BIOLOGY FOR IGCSE AND 0 LEVEL INTERNATIONAL EDITION".
CHAMPAIGN:
Chelsea House,
2002.
BIDAN.