Cita APA

Shepard, P., & Shepard, F. R. (1999). Encounters with nature: Essays. Washington, D.C.: Island Press [for] Shearwater Books.

Chicago Style Citation

Shepard, Paul, i Florence R. Shepard. Encounters With Nature: Essays. Washington, D.C.: Island Press [for] Shearwater Books, 1999.

Cita MLA

Shepard, Paul, i Florence R. Shepard. Encounters With Nature: Essays. Washington, D.C.: Island Press [for] Shearwater Books, 1999.