APA (7th ed.) Citation

Keyes, O. P., & Smith, H. D. (1968). Modern power for modern mining. Coal Age (00099910), 73, 76.

Chicago Style (17th ed.) Citation

Keyes, O. P., and H. D. Smith. "Modern Power for Modern Mining." Coal Age (00099910) 73 (1968): 76.

MLA (9th ed.) Citation

Keyes, O. P., and H. D. Smith. "Modern Power for Modern Mining." Coal Age (00099910), vol. 73, 1968, p. 76.