APA (7th ed.) Citation

Stoddard, B. H. (1932). Phosphate rock industry in 1931; advance final summary. [publisher not identified].

Chicago Style (17th ed.) Citation

Stoddard, B. H. Phosphate Rock Industry in 1931; Advance Final Summary. Washington, D.C.: [publisher not identified], 1932.

MLA (9th ed.) Citation

Stoddard, B. H. Phosphate Rock Industry in 1931; Advance Final Summary. [publisher not identified], 1932.