Commercial travelers' guide to Latin America.
Part III,
Mexico, Central America and Caribbean countries.

APA Citation

Etats-Unis. Bureau of foreign and domestic commerce. (1940). Commercial travelers' guide to Latin America. Washington: Government printing office.

MLA Citation

Etats-Unis. Bureau of foreign and domestic commerce. Commercial Travelers' Guide to Latin America. Washington: Government printing office, 1940.

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