Gaya APA
Pedler, G, D, A, K.
(1986).
Doomwatch: The world in danger
(
1)
.
England:
Longman.
Gaya MLA
Pedler, Gerry, Davis, And, Kit.
"Doomwatch: The world in danger".
1
England:
Longman,
1986.
Buku Analog.