Austria, B. S. (1976). Status of minerals in the Philippine future: A preliminary report. Population Resources Environment and the Philippine Future].
Chicago Style aipamenaAustria, Benjamin S. Status of Minerals in the Philippine Future: A Preliminary Report. [Quezon City: Population Resources Environment and the Philippine Future], 1976.
MLA aipamenaAustria, Benjamin S. Status of Minerals in the Philippine Future: A Preliminary Report. Population Resources Environment and the Philippine Future], 1976.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.