Gaya APA
Alfred Petrick, Jr ;. (1986).
Energy Resource Assesment .
:
.
Gaya Chicago
Alfred Petrick, Jr ;.
Energy Resource Assesment.
:
,
1986.
Buku.
Gaya MLA
Alfred Petrick, Jr ;.
Energy Resource Assesment.
:
,
1986.
Buku.
Gaya Turabian
Alfred Petrick, Jr ;.
Energy Resource Assesment.
:
,
1986.
Buku.