(1986). Yearbook of science and the future 1987. Encyclopaedia Britannica.
Cita Chicago Style (17a ed.)Yearbook of Science and the Future 1987. Chicago [etc.]: Encyclopaedia Britannica, 1986.
Cita MLA (9a ed.)Yearbook of Science and the Future 1987. Encyclopaedia Britannica, 1986.
Precaución: Estas citas no son 100% exactas.