APA Citatie

National Geographic Society (U.S.). Cartographic Division., Shupe, J. F., Ritter, L. R., Wahll, A. J., Pratt, R. E., & Tirion, W. (1995). The heavens ; Star birth in the Orion Nebula. Washington, D.C.: The Society.

Chicago Style citaat

National Geographic Society (U.S.). Cartographic Division., John F. Shupe, Lisa R. Ritter, Andrew J. Wahll, Robert E. Pratt, en Wil Tirion. The Heavens ; Star Birth in the Orion Nebula. Washington, D.C.: The Society, 1995.

MLA citatie

National Geographic Society (U.S.). Cartographic Division., et al. The Heavens ; Star Birth in the Orion Nebula. Washington, D.C.: The Society, 1995.

Let op: Deze citaties zijn niet altijd 100% accuraat.