APA (7th ed.) Citation

Foxworthy, B. L., & Hill, M. (1984). Volcanic eruptions of 1980 at Mount S[aint] Helens (2. print.). United States Gov. Print. Off.

Chicago Style (17th ed.) Citation

Foxworthy, Bruce L., and Mary Hill. Volcanic Eruptions of 1980 at Mount S[aint] Helens. 2. print. Washington: United States Gov. Print. Off, 1984.

MLA (9th ed.) Citation

Foxworthy, Bruce L., and Mary Hill. Volcanic Eruptions of 1980 at Mount S[aint] Helens. 2. print. United States Gov. Print. Off, 1984.