Cita APA (7a ed.)
(1993). Discovering the wonders of our world (ed.). The reader's digest association.
Cita Chicago Style (17a ed.)
Discovering the Wonders of Our World. ed. London: The reader's digest association, 1993.
Cita MLA (9a ed.)
Discovering the Wonders of Our World. ed. The reader's digest association, 1993.
Precaución: Estas citas no son 100% exactas.