R K Sinha. (2019). Mineral Economics (4th.). CBS.
Chicago Style aipamenaR K Sinha. Mineral Economics. 4th. NewDelhi: CBS, 2019.
MLA aipamenaR K Sinha. Mineral Economics. 4th. CBS, 2019.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
R K Sinha. (2019). Mineral Economics (4th.). CBS.
Chicago Style aipamenaR K Sinha. Mineral Economics. 4th. NewDelhi: CBS, 2019.
MLA aipamenaR K Sinha. Mineral Economics. 4th. CBS, 2019.