Gaya APA
Adler, M, J. (1996).
Great books of the western worldptolemy copernicus kepler (15).
Amerika:
Encyclopedia Britannica Inc.
Gaya MLA
Adler, Mortimer, J..
"Great books of the western worldptolemy copernicus kepler".
15
Amerika:
Encyclopedia Britannica Inc,
1996.
Text.