APA Citation

Wyckoff, J. (1967). Secrets of the earth. London: Golden Pleasure Books.

Chicago Style Citation

Wyckoff, Jerome. Secrets of the Earth. London: Golden Pleasure Books, 1967.

MLA Citation

Wyckoff, Jerome. Secrets of the Earth. London: Golden Pleasure Books, 1967.

Warning: These citations may not always be 100% accurate.