Cita APA

Silva, M. e. (1972). 1973 Britannica yearbooks of science and the future. Encyclopaedia Britannica.

Chicago Edition Citation

Silva, Michel ed. 1973 Britannica Yearbooks of Science and the Future. Chicago: Encyclopaedia Britannica, 1972.

Cita MLA

Silva, Michel ed. 1973 Britannica Yearbooks of Science and the Future. Encyclopaedia Britannica, 1972.