Não informado. (2012). Publications of the Yerkes Observatory. University of Chicago Press.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Publications of the Yerkes Observatory. Chicago, Ill: University of Chicago Press, 2012.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Publications of the Yerkes Observatory. University of Chicago Press, 2012.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.