Gaya APA

Wolthers, M. (1974). Geochemistry and Environmental Mineralogy of The Iron - Sulphur - Arsenic System . Utrecht Belanda: Geologica Ultraiectina.

Gaya MLA

Wolthers, Mariette. "Geochemistry and Environmental Mineralogy of The Iron - Sulphur - Arsenic System". Utrecht Belanda: Geologica Ultraiectina, 1974. Text.