APA (7th ed.) Citation

Eve, A. S., & Keys, D. A. (1928). Geophysical prospecting: Some electrical methods. [publisher not identified].

Chicago Style (17th ed.) Citation

Eve, A. S., and D. A. Keys. Geophysical Prospecting: Some Electrical Methods. [Washington?]: [publisher not identified], 1928.

MLA (9th ed.) Citation

Eve, A. S., and D. A. Keys. Geophysical Prospecting: Some Electrical Methods. [publisher not identified], 1928.