APA (7th ed.) Citation

Healey, M. V., & Johns, A. L. (1930). Selected bibliography and map of manganese deposits of U.S. by districts. [publisher not identified].

Chicago Style (17th ed.) Citation

Healey, M. V., and A. L. Johns. Selected Bibliography and Map of Manganese Deposits of U.S. by Districts. Washington, D.C.: [publisher not identified], 1930.

MLA (9th ed.) Citation

Healey, M. V., and A. L. Johns. Selected Bibliography and Map of Manganese Deposits of U.S. by Districts. [publisher not identified], 1930.