APA (7th ed.) Citation

Youngman, E. P. (1930). Mining laws of Spain. [publisher not identified].

Chicago Style (17th ed.) Citation

Youngman, E. P. Mining Laws of Spain. Washington, D.C.: [publisher not identified], 1930.

MLA (9th ed.) Citation

Youngman, E. P. Mining Laws of Spain. [publisher not identified], 1930.