Cita APA (7a ed.)

Friday, L., & Laskey, R. (1991). The fragile environment ([1st ed., rep.].). Cambridge University Press.

Cita Chicago Style (17a ed.)

Friday, Laurie, y Ronald Laskey. The Fragile Environment. [1st ed., rep.]. Cambridge, United Kingdom: Cambridge University Press, 1991.

Cita MLA (9a ed.)

Friday, Laurie, y Ronald Laskey. The Fragile Environment. [1st ed., rep.]. Cambridge University Press, 1991.