APA (7th ed.) Citation

Bews, J. W. (1929). The world's grasses: Their differentiation, distribution economics and ecology. Longmans [u.a.].

Chicago Style (17th ed.) Citation

Bews, John W. The World's Grasses: Their Differentiation, Distribution Economics and Ecology. London [u.a.]: Longmans [u.a.], 1929.

MLA (9th ed.) Citation

Bews, John W. The World's Grasses: Their Differentiation, Distribution Economics and Ecology. Longmans [u.a.], 1929.