APA (7th ed.) Citation

Soderstrom, T. R., & Beaman, J. H. (1968). The genus Bromus (Gramineae) in Mexico and Central America. [publisher not identified].

Chicago Style (17th ed.) Citation

Soderstrom, Thomas R., and John H. Beaman. The Genus Bromus (Gramineae) in Mexico and Central America. East Lansing: [publisher not identified], 1968.

MLA (9th ed.) Citation

Soderstrom, Thomas R., and John H. Beaman. The Genus Bromus (Gramineae) in Mexico and Central America. [publisher not identified], 1968.