Gaya APA
Burgess, J, E, A. (1991).
Look It Up #12 : The World of Machines (Second Edition).
Hong Kong:
Heinemann Childrens Referece.
Gaya MLA
Burgess, Jan, Et, Al..
"Look It Up #12 : The World of Machines".
Second Edition
Hong Kong:
Heinemann Childrens Referece,
1991.
Text.