Lua APA (7ú heag.)

Barrett, O. W. (1928). The tropical crops. The Macmillan Company.

Lua i Stíl Chicago (17ú heag.)

Barrett, Otis Warren. The Tropical Crops. New York: The Macmillan Company, 1928.

Lua MLA (9ú heag.)

Barrett, Otis Warren. The Tropical Crops. The Macmillan Company, 1928.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.