Cita APA (7a ed.)

Gilkey, H. M. (1945). Northwestern American plants. Oregon State College ; College Press.

Cita Chicago Style (17a ed.)

Gilkey, Helen M. Northwestern American Plants. Corvallis, Or.: Oregon State College ; College Press, 1945.

Cita MLA (8a ed.)

Gilkey, Helen M. Northwestern American Plants. Oregon State College ; College Press, 1945.

Precaución: Estas citas no son 100% exactas.