Cita APA

Alnwick, H. (1969). A geography of commodities (6a. ed.). London: Harrap.

Citación estilo Chicago

Alnwick, Herbert. A Geography of Commodities. 6a. ed. London: Harrap, 1969.

Cita MLA

Alnwick, Herbert. A Geography of Commodities. 6a. ed. London: Harrap, 1969.