APA

Roper D. C., . (2007). The effect of the direct historical approach on the develpment of theory in plains archaeology. Washington-US: Society for American Archaeology.

Chicago

Roper Donna C, . 2007. The effect of the direct historical approach on the develpment of theory in plains archaeology. Washington-US: Society for American Archaeology.

Harvard

Roper D. C., . (2007). The effect of the direct historical approach on the develpment of theory in plains archaeology. Washington-US: Society for American Archaeology.

MLA

Roper Donna C, . The effect of the direct historical approach on the develpment of theory in plains archaeology. Washington-US: Society for American Archaeology. 2007.