Freeman, S., Allison, L. A., Black, M., & Podgorski, G. (2014). Biological science (Fifth edition.). Pearson.
Lua i Stíl Chicago (17ú heag.)Freeman, Scott, Lizabeth Ann Allison, Michael Black, agus Greg Podgorski. Biological Science. Fifth edition. Boston: Pearson, 2014.
Lua MLA (9ú heag.)Freeman, Scott, et al. Biological Science. Fifth edition. Pearson, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.