SMITH, R. L. (1980). Ecology And Field Biology Robert Leo Smith. Harper & Row Publisher.
Lua i Stíl Chicago (17ú heag.)SMITH, Robert Leo. Ecology And Field Biology Robert Leo Smith. Harper & Row Publisher, 1980.
Lua MLA (8ú heag.)SMITH, Robert Leo. Ecology And Field Biology Robert Leo Smith. Harper & Row Publisher, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.