Kuangye anquan yu huan-bao | Editorial Office of Mining Safety & Environmental Protection. Cambridge University Press.
Cita Chicago (17th ed.)Kuangye Anquan Yu Huan-bao | Editorial Office of Mining Safety & Environmental Protection. Cambridge University Press.
Cita MLA (9th ed.)Kuangye Anquan Yu Huan-bao | Editorial Office of Mining Safety & Environmental Protection. Cambridge University Press.
Atenció: Aquestes cites poden no estar 100% correctes.