“Astronomy Answers.” Sink or Float?: Thought Problems in Math and Physics, by Keith Kendig, 1st ed., vol. 33, Mathematical Association of America, 2008, pp. 253–266, www.jstor.org/stable/10.4169/j.ctt6wpwdk.18. Accessed 12 May 2021.
Kendig, K. (2008). Astronomy Answers. In Sink or Float?: Thought Problems in Math and Physics (pp. 253-266). Mathematical Association of America. Retrieved May 12, 2021, from http://www.jstor.org/stable/10.4169/j.ctt6wpwdk.18
Kendig, Keith. "Astronomy Answers." In Sink or Float?: Thought Problems in Math and Physics, 253-66. Mathematical Association of America, 2008. Accessed May 12, 2021. http://www.jstor.org/stable/10.4169/j.ctt6wpwdk.18.
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