APA (7th ed.) Citation

Gilkey, H. M., & Packard, P. L. (1962). Winter twigs. Oregon State University Press.

Chicago Style (17th ed.) Citation

Gilkey, Helen Margaret, and Patricia L. Packard. Winter Twigs. Oregon: Oregon State University Press, 1962.

MLA (9th ed.) Citation

Gilkey, Helen Margaret, and Patricia L. Packard. Winter Twigs. Oregon State University Press, 1962.