Payne, J. (1980). Microorganisms and nitrogen sources. John Wiley and Sons.
Lua i Stíl Chicago (17ú heag.)Payne, J.W. Microorganisms and Nitrogen Sources. Chichester: John Wiley and Sons, 1980.
Lua MLA (9ú heag.)Payne, J.W. Microorganisms and Nitrogen Sources. John Wiley and Sons, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.