Gaya APA
allan, L.
(2012).
Laboratoryum Manual for Introductory Geology
(
2nd Ed.)
.
Amerika serikat:
precison graphics.
Gaya MLA
allan, Ludman.
"Laboratoryum Manual for Introductory Geology".
2nd Ed.
Amerika serikat:
precison graphics,
2012.
Text.