Cita APA (7a ed.)

(1971). Britannica yearbook of science and the future. Encyclopaedia Britannica.

Cita Chicago Style (17a ed.)

Britannica Yearbook of Science and the Future. Chicago: Encyclopaedia Britannica, 1971.

Cita MLA (8a ed.)

Britannica Yearbook of Science and the Future. Encyclopaedia Britannica, 1971.