Surface survey of the Virú Valley, Peru. 1. Virú Valley; background and problems

MLA

Ford, James Alfred, Gordon R. Willey and Gotham Book Mart Collection (University of Pennsylvania). Surface survey of the Virú Valley, Peru. 1. Virú Valley; background and problems. New York, [publisher not identified], 1949.

APA

Ford, J., Willey, G. & Gotham Book Mart Collection (University of Pennsylvania). (1949). Surface survey of the Virú Valley, Peru. 1. Virú Valley; background and problems. New York, [publisher not identified].

Chicago

Ford, James Alfred, Gordon R. Willey and Gotham Book Mart Collection (University of Pennsylvania). Surface survey of the Virú Valley, Peru. 1. Virú Valley; background and problems. New York, [publisher not identified], 1949.