Allen, T. F. (1879). Characeae Americanae. T.F. Allen.
Lua i Stíl Chicago (17ú heag.)Allen, Timothy Field. Characeae Americanae. New York: T.F. Allen, 1879.
Lua MLA (8ú heag.)Allen, Timothy Field. Characeae Americanae. T.F. Allen, 1879.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.