APA (7th ed.) Citation

Heck, N. H. (1965). Earthquakes. Hafner Publishing.

Chicago Style (17th ed.) Citation

Heck, Nicholas Hunter. Earthquakes. New York: Hafner Publishing, 1965.

MLA (9th ed.) Citation

Heck, Nicholas Hunter. Earthquakes. Hafner Publishing, 1965.

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