APA (7th ed.) Citation

Peterson, G. R. (2009). A Hard Problem Indeed. Zygon, 44(1), 19-29. doi:10.1111/j.1467-9744.2009.00982.x

Chicago Style (17th ed.) Citation

Peterson, Gregory R. "A Hard Problem Indeed." Zygon 44, no. 1 (2009): 19-29, https://doi.org/10.1111/j.1467-9744.2009.00982.x.

MLA (8th ed.) Citation

Peterson, Gregory R. "A Hard Problem Indeed." Zygon, vol. 44, no. 1, 2009, pp. 19-29, https://doi.org/10.1111/j.1467-9744.2009.00982.x.

Warning: These citations may not always be 100% accurate.