APA ציטוט

McCallum, R. I. (1968). Digest of Pneumoconiosis Statistics 1966.

Citação norma Chicago

McCallum, R. I. Digest of Pneumoconiosis Statistics 1966. 1968.

ציטוט MLA

McCallum, R. I. Digest of Pneumoconiosis Statistics 1966. 1968.