Citação norma APA

Clay, R. F. (2014). Tribe at a Crossroads: The Navajo Nation Purchases a Coal Mine. National Institute of Environmental Health Sciences.

Citação norma Chicago

Clay, Rebecca Fairfax. Tribe At a Crossroads: The Navajo Nation Purchases a Coal Mine. National Institute of Environmental Health Sciences, 2014.

Citação norma MLA

Clay, Rebecca Fairfax. Tribe At a Crossroads: The Navajo Nation Purchases a Coal Mine. National Institute of Environmental Health Sciences, 2014.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.