APA (7th ed.) Citation

Valtonen, M. J., Lehto, H. J., Nilsson, K., Heidt, J., Takalo, L. O., Sillanpää, A., . . . Siwak, M. (2008). A massive binary black-hole system in OJ 287 and a test of general relativity. Nature, 452(7189), 851. https://doi.org/10.1038/nature06896

Chicago Style (17th ed.) Citation

Valtonen, M. J., et al. "A Massive Binary Black-hole System in OJ 287 and a Test of General Relativity." Nature 452, no. 7189 (2008): 851. https://doi.org/10.1038/nature06896.

MLA (9th ed.) Citation

Valtonen, M. J., et al. "A Massive Binary Black-hole System in OJ 287 and a Test of General Relativity." Nature, vol. 452, no. 7189, 2008, p. 851, https://doi.org/10.1038/nature06896.