APA (7th ed.) Citation

Probert, F. H. (1939). Some trends in mining practice in 1938. Engineering & Mining Journal (00958948), 140, 68.

Chicago Style (17th ed.) Citation

Probert, F. H. "Some Trends in Mining Practice in 1938." Engineering & Mining Journal (00958948) 140 (1939): 68.

MLA (9th ed.) Citation

Probert, F. H. "Some Trends in Mining Practice in 1938." Engineering & Mining Journal (00958948), vol. 140, 1939, p. 68.

Warning: These citations may not always be 100% accurate.