APA (7th ed.) Citation

Watkins, J. S. (1961). Gravity and magnetism of the Ouachita structural belt in Central Texas. [publisher not identified].

Chicago Style (17th ed.) Citation

Watkins, Joel S. Gravity and Magnetism of the Ouachita Structural Belt in Central Texas. [Place of publication not identified]: [publisher not identified], 1961.

MLA (9th ed.) Citation

Watkins, Joel S. Gravity and Magnetism of the Ouachita Structural Belt in Central Texas. [publisher not identified], 1961.