APA (7th ed.) Citation

Stephenson, F. R., Willis, D. M., & Steele, J. (2002). The Earliest Datable Observation of the Aurora Borealis.

Chicago Style (17th ed.) Citation

Stephenson, F. Richard, David M. Willis, and J.M Steele. The Earliest Datable Observation of the Aurora Borealis. 2002.

MLA (8th ed.) Citation

Stephenson, F. Richard, et al. The Earliest Datable Observation of the Aurora Borealis. 2002.