APA (7th ed.) Citation

Fieldner, A. C., Pope, G. S., & Davis, J. D. Proceedings of the second Pan American scientific congress: Standard methods for sampling and analyzing coal.

Chicago Style (17th ed.) Citation

Fieldner, A. C., G. S. Pope, and J. D. Davis. Proceedings of the Second Pan American Scientific Congress: Standard Methods for Sampling and Analyzing Coal.

MLA (9th ed.) Citation

Fieldner, A. C., et al. Proceedings of the Second Pan American Scientific Congress: Standard Methods for Sampling and Analyzing Coal.