International Astronomical Union & Burton, W. B. (1979). The large-scale characteristics of the galaxy: Symposium held in College Park, Maryland, U.S.A., 12-17 June, 1978. Symposium.
Chicago-Zitierstil (17. Ausg.)International Astronomical Union und William B. Burton. "The Large-scale Characteristics of the Galaxy: Symposium Held in College Park, Maryland, U.S.A., 12-17 June, 1978." Symposium 1979.
MLA-Zitierstil (9. Ausg.)International Astronomical Union und William B. Burton. "The Large-scale Characteristics of the Galaxy: Symposium Held in College Park, Maryland, U.S.A., 12-17 June, 1978." Symposium, 1979.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.