APA-referens

Hutchins, R. M. (1952). Great books of the Western World: Ptolemy, Copernicus, Kepler. Encyclopaedia Britannica.

Chicago-stil citat

Hutchins, Robert Maynard. Great Books of the Western World: Ptolemy, Copernicus, Kepler. Chicago: Encyclopaedia Britannica, 1952.

MLA-referens

Hutchins, Robert Maynard. Great Books of the Western World: Ptolemy, Copernicus, Kepler. Encyclopaedia Britannica, 1952.