APA Edition Citation

Calhoun, D., & Silva, M. (1972). 1973 Britannica yearbook of science and the future.

Chicago Edition Citation

Calhoun, David, and Michel Silva. 1973 Britannica Yearbook of Science and the Future. Chicago, Encyclopaedia Britannica Inc, 1972.

MLA Edition Citation

Calhoun, David, and Michel Silva. 1973 Britannica Yearbook of Science and the Future. 1972.

Warning: These citations may not always be 100% accurate.