(1999). Yearbook of Science and the Future 2000 (1a ed.). Encyclopaedia Britannica, Inc.
Cita Chicago Style (17a ed.)Yearbook of Science and the Future 2000. 1a ed. Chicago: Encyclopaedia Britannica, Inc, 1999.
Cita MLA (9a ed.)Yearbook of Science and the Future 2000. 1a ed. Encyclopaedia Britannica, Inc, 1999.
Precaución: Estas citas no son 100% exactas.