Jessop, N. M. (1970). Biosphere: A study of life. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Jessop, Nancy Meyer. Biosphere: A Study of Life. Englewood Cliffs, N.J: Prentice-Hall, 1970.
Lua MLA (9ú heag.)Jessop, Nancy Meyer. Biosphere: A Study of Life. Prentice-Hall, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.