Gaya APA
Duff, A., Lewis, J, L.
(1984).
Longman Physics Topics - Pressures
(
1)
.
London:
Longman.
Gaya MLA
Duff, Alan., Lewis, John, L..
"Longman Physics Topics - Pressures".
1
London:
Longman,
1984.
Buku Analog.