Cita APA (7a ed.)
(1982). Science year :1977: The World book science annual. Field Enterprises Educational Corporation.
Cita Chicago Style (17a ed.)
Science Year :1977: The World Book Science Annual. Chicago: Field Enterprises Educational Corporation, 1982.
Cita MLA (9a ed.)
Science Year :1977: The World Book Science Annual. Field Enterprises Educational Corporation, 1982.
Precaución: Estas citas no son 100% exactas.