APA (7th ed.) Citation

Washington, H. S., Aurousseau, M., & Keyes, M. G. (1926). Lavas of Etna. American Journal of Science, 371.

Chicago Style (17th ed.) Citation

Washington, H. S., M. Aurousseau, and M. G. Keyes. "Lavas of Etna." American Journal of Science 1926: 371.

MLA (9th ed.) Citation

Washington, H. S., et al. "Lavas of Etna." American Journal of Science, 1926, p. 371.