Coulson, T., Lindström, J., & Cotgreave, P. (2002). Ecology. Seeking new recruits.
Lua i Stíl Chicago (17ú heag.)Coulson, T., J. Lindström, agus P. Cotgreave. Ecology. Seeking New Recruits. 2002.
Lua MLA (9ú heag.)Coulson, T., et al. Ecology. Seeking New Recruits. 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.