APA (7th ed.) Citation

Davison, J. K., & Bro, & Williamson, G. H. (1932). Sand and gravel dredging methods and costs of J. K. Davison and Brother, Pittsburgh, Pa. [publisher not identified].

Chicago Style (17th ed.) Citation

Davison, J. K., & Bro, and George Hunt Williamson. Sand and Gravel Dredging Methods and Costs of J. K. Davison and Brother, Pittsburgh, Pa. Washington, D.C.: [publisher not identified], 1932.

MLA (9th ed.) Citation

Davison, J. K., & Bro, and George Hunt Williamson. Sand and Gravel Dredging Methods and Costs of J. K. Davison and Brother, Pittsburgh, Pa. [publisher not identified], 1932.