Gaya APA
Kerrod, R.
(1998).
Encyclopedia Of Science 2 : The Heavens
(
Cet 1)
.
USA:
Macmillan Library Reference.
Gaya MLA
Kerrod, Robin.
"Encyclopedia Of Science 2 : The Heavens".
Cet 1
USA:
Macmillan Library Reference,
1998.
Art Original.