Gaya APA
Philpotts,, A, R.
(1989).
Petrography of igneous and metamorfic rocks
.
Englewood Cliffs:
Prentice Hall.
Gaya MLA
Philpotts,, Anthony, R.
"Petrography of igneous and metamorfic rocks".
Englewood Cliffs:
Prentice Hall,
1989.
Text.