APA ציטוט

Vrooman, C. H. (1936). Silicosis and its Incidence in British Columbia.

Citação norma Chicago

Vrooman, C. H. Silicosis and Its Incidence in British Columbia. 1936.

ציטוט MLA

Vrooman, C. H. Silicosis and Its Incidence in British Columbia. 1936.