Cita APA (7a ed.)
Ehrlich, E. Contest between countries: 1937-1986.
Cita Chicago Style (17a ed.)
Ehrlich, E. Contest Between Countries: 1937-1986.
Cita MLA (9a ed.)
Ehrlich, E. Contest Between Countries: 1937-1986.
Precaución: Estas citas no son 100% exactas.