APA-čujuhus (7. p.)
Calhoun, D. 1985 Yearbook of Science and the Future. Encyclopaedia Britannica.
Chicago-čujuhus (17. p.)
Calhoun, David. 1985 Yearbook of Science and the Future. Chicago, EUA: Encyclopaedia Britannica.
MLA-čujuhus (9. p.)
Calhoun, David. 1985 Yearbook of Science and the Future. Encyclopaedia Britannica.
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