APA (7th ed.) Citation

Ehrlich, A. M. (1968). Rare earth abundances in manganese nodules. [publisher not identified].

Chicago Style (17th ed.) Citation

Ehrlich, Alan M. Rare Earth Abundances in Manganese Nodules. [Place of publication not identified]: [publisher not identified], 1968.

MLA (9th ed.) Citation

Ehrlich, Alan M. Rare Earth Abundances in Manganese Nodules. [publisher not identified], 1968.