APA (7th ed.) Citation

Lemonick, M. D. (2014). Pluto and beyond. Scientific American, 311(5), 46. https://doi.org/10.1038/scientificamerican1114-46

Chicago Style (17th ed.) Citation

Lemonick, Michael D. "Pluto and Beyond." Scientific American 311, no. 5 (2014): 46. https://doi.org/10.1038/scientificamerican1114-46.

MLA (9th ed.) Citation

Lemonick, Michael D. "Pluto and Beyond." Scientific American, vol. 311, no. 5, 2014, p. 46, https://doi.org/10.1038/scientificamerican1114-46.