Campbell, P. B., & Howard, P. (1957). America needs an ideology. Frederick Muller.
Cita Chicago Style (17a ed.)Campbell, Paul B., y Peter Howard. America Needs an Ideology. London: Frederick Muller, 1957.
Cita MLA (9a ed.)Campbell, Paul B., y Peter Howard. America Needs an Ideology. Frederick Muller, 1957.
Precaución: Estas citas no son 100% exactas.