APA (7th ed.) Citation

Casteret, N. (1961). More years under the earth. Neville Spearman.

Chicago Style (17th ed.) Citation

Casteret, Norbert. More Years Under the Earth. London: Neville Spearman, 1961.

MLA (9th ed.) Citation

Casteret, Norbert. More Years Under the Earth. Neville Spearman, 1961.