BUSCADOR DE RECURSOS UNSAM

Cita APA (7a ed.)

Tilden, F., & Hartzog, G. B., Jr. (1979). The national parks (a revised & enlarged edition.). Alfred A. Knopf.

Cita Chicago Style (17a ed.)

Tilden, Freeman, y George B. Hartzog, Jr. The National Parks. a revised & enlarged edition. New York: Alfred A. Knopf, 1979.

Cita MLA (8a ed.)

Tilden, Freeman, y George B. Hartzog, Jr. The National Parks. a revised & enlarged edition. Alfred A. Knopf, 1979.