Isern, T. D. (1990). Bull Threshers and Bindlestiffs: Harvesting and Threshing on the North American Plains. University Press of Kansas.
Lua i Stíl Chicago (17ú heag.)Isern, Thomas D. Bull Threshers and Bindlestiffs: Harvesting and Threshing on the North American Plains. Lawrence, Kan.: University Press of Kansas, 1990.
Lua MLA (9ú heag.)Isern, Thomas D. Bull Threshers and Bindlestiffs: Harvesting and Threshing on the North American Plains. University Press of Kansas, 1990.
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