Zickgraf, F., Wolf, B., Stahl, O., Kaufer, A., & Appenzeller, I. (1996). R4 in the small magellanic cloud: A spectroscopic binary with a B[e]/LBV-type component. Astronomy and astrophysics, 309, .
Chicago Style (17th ed.) CitationZickgraf, Franz-Josef, Bernhard Wolf, Otmar Stahl, Andreas Kaufer, and Immo Appenzeller. "R4 in the Small Magellanic Cloud: A Spectroscopic Binary with a B[e]/LBV-type Component." Astronomy and Astrophysics 309 (1996).
MLA (9th ed.) CitationZickgraf, Franz-Josef, et al. "R4 in the Small Magellanic Cloud: A Spectroscopic Binary with a B[e]/LBV-type Component." Astronomy and Astrophysics, vol. 309, 1996.
Warning: These citations may not always be 100% accurate.