APA (7th ed.) Citation

Weir, J. R., & Hubert, E. E. (1918). A study of heart-rot in western hemlock.

Chicago Style (17th ed.) Citation

Weir, James R., and Ernest E. Hubert. A Study of Heart-rot in Western Hemlock. Washington, DC, 1918.

MLA (9th ed.) Citation

Weir, James R., and Ernest E. Hubert. A Study of Heart-rot in Western Hemlock. 1918.