Gaya APA

David, M., Diehl, P. (1981). Clasification of ore reserves/resources based on geostatistical methods . S.I.: Mineral Exploration Research Institute.

Gaya MLA

David, M.., Diehl, P.. "Clasification of ore reserves/resources based on geostatistical methods". S.I.: Mineral Exploration Research Institute, 1981. Umum.