McClelland, Peter D.. "1. The Problem". Sowing Modernity: America's First Agricultural Revolution, Ithaca, NY: Cornell University Press, 1997, pp. 1-6. https://doi.org/10.7591/9781501728655-002
McClelland, P. (1997). 1. The Problem. In Sowing Modernity: America's First Agricultural Revolution (pp. 1-6). Ithaca, NY: Cornell University Press. https://doi.org/10.7591/9781501728655-002
McClelland, P. 1997. 1. The Problem. Sowing Modernity: America's First Agricultural Revolution. Ithaca, NY: Cornell University Press, pp. 1-6. https://doi.org/10.7591/9781501728655-002
McClelland, Peter D.. "1. The Problem" In Sowing Modernity: America's First Agricultural Revolution, 1-6. Ithaca, NY: Cornell University Press, 1997. https://doi.org/10.7591/9781501728655-002
McClelland P. 1. The Problem. In: Sowing Modernity: America's First Agricultural Revolution. Ithaca, NY: Cornell University Press; 1997. p.1-6. https://doi.org/10.7591/9781501728655-002