APA引文

(1970). 1971 Britannica yearbooks of science and the future. Encyclopaedia Britannica.

Chicago Edition Citation

1971 Britannica Yearbooks of Science and the Future. Chicago: Encyclopaedia Britannica, 1970.

MLA引文

1971 Britannica Yearbooks of Science and the Future. Encyclopaedia Britannica, 1970.

警告：這些引文格式不一定是100％准確.