Gaya APA
minerals yearbook. (1988).
washigton:
.
Gaya Chicago
minerals yearbook.
vol 1.
washigton:
,
1988.
Text Book Sipil.
Gaya MLA
minerals yearbook.
vol 1.
washigton:
,
1988.
Text Book Sipil.
Gaya Turabian
minerals yearbook.
washigton:
,
1988.
Text Book Sipil.