(1965). The World Book Encyclopedia M: Volume 13. Field Enterprises Educational Corporation.
Cita Chicago Style (17a ed.)The World Book Encyclopedia M: Volume 13. Chicago, Estados Unidos: Field Enterprises Educational Corporation, 1965.
Cita MLA (9a ed.)The World Book Encyclopedia M: Volume 13. Field Enterprises Educational Corporation, 1965.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.