Gaya APA
Croft, D., T.D., E.
(1990).
Energy Efficiency /DR Croft
(
Edisi 1 Jilid 1)
.
USA:
Longman.
Gaya MLA
Croft, DR., T.D., Eastop.
"Energy Efficiency /DR Croft".
Edisi 1 Jilid 1
USA:
Longman,
1990.
Text.