Cita APA (7th ed.)
Calhoun, D. 1975 [i.e. Nineteen Seventy-Five] Yearbook of Science and the Future. Encyclopaedia Britannica.
Cita Chicago (17th ed.)
Calhoun, David. 1975 [i.e. Nineteen Seventy-Five] Yearbook of Science and the Future. Chicago, EUA: Encyclopaedia Britannica.
Cita MLA (9th ed.)
Calhoun, David. 1975 [i.e. Nineteen Seventy-Five] Yearbook of Science and the Future. Encyclopaedia Britannica.
Atenció: Aquestes cites poden no estar 100% correctes.