APA (7th ed.) Citation

Stetson, H. T. (1947). Sunspots in action. The Ronald Press.

Chicago Style (17th ed.) Citation

Stetson, Harlan T. Sunspots in Action. New York: The Ronald Press, 1947.

MLA (9th ed.) Citation

Stetson, Harlan T. Sunspots in Action. The Ronald Press, 1947.

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