FRIED, G. H. (1990). Schaum's Outline Of Theory And Problems Of Biology. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)FRIED, George H. Schaum's Outline Of Theory And Problems Of Biology. McGraw-Hill, 1990.
Lua MLA (8ú heag.)FRIED, George H. Schaum's Outline Of Theory And Problems Of Biology. McGraw-Hill, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.