Cita APA (7a ed.)

Hitchcock, C. L., Cronquist, A., Ownbey, M., & Thompson, J. W. (1961). Vascular plants of the pacific northwest. University of Washington Press.

Cita Chicago Style (17a ed.)

Hitchcock, C. Leo, Arthur Cronquist, Marion Ownbey, y J. W. Thompson. Vascular Plants of the Pacific Northwest. Seattle: University of Washington Press, 1961.

Cita MLA (8a ed.)

Hitchcock, C. Leo, et al. Vascular Plants of the Pacific Northwest. University of Washington Press, 1961.