Dennis B. Fradin. (1983). Astronomy (New True Book). Childrens Pr.
Chicago Style aipamenaDennis B. Fradin. Astronomy (New True Book). Childrens Pr, 1983.
MLA aipamenaDennis B. Fradin. Astronomy (New True Book). Childrens Pr, 1983.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.