Political essay on the kingdom of New Spain ... /
By Alexander de Humboldt. With physical sections and maps ... Tr. from the original French by John Black. v. 1-2.

APA Citation

Humboldt, A. von., Black, J. (1811). Political essay on the kingdom of New Spain .... New York: I. Riley.

MLA Citation

Humboldt, Alexander von, 1769-1859, and John Black. Political Essay On the Kingdom of New Spain .... New York: I. Riley, 1811.

Warning: These citations may not always be complete (especially for serials).