APA

Detlef Langer E., Congress of Americanist at the University of Manchester, . (1982). Trade Routes and Commercialization of Barley in Yamparaez, 1890-1930. Manchester: University of Manchester.

Chicago

Detlef Langer Erick, Congress of Americanist at the University of Manchester, . 1982. Trade Routes and Commercialization of Barley in Yamparaez, 1890-1930. Manchester: University of Manchester.

Harvard

Detlef Langer E., Congress of Americanist at the University of Manchester, . (1982). Trade Routes and Commercialization of Barley in Yamparaez, 1890-1930. Manchester: University of Manchester.

MLA

Detlef Langer Erick, Congress of Americanist at the University of Manchester, . Trade Routes and Commercialization of Barley in Yamparaez, 1890-1930. Manchester: University of Manchester. 1982.