Shapely, H. (1960). Sourcebook in astronomy, 1900-1050. Harvard University Press.
Chicago Style aipamenaShapely, Harlow. Sourcebook in Astronomy, 1900-1050. Cambridge, MA: Harvard University Press, 1960.
MLA aipamenaShapely, Harlow. Sourcebook in Astronomy, 1900-1050. Harvard University Press, 1960.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.