@book{292651,
	author = {Villarreal, Omar and Kirac, Marina},
	title = {Polimodal english : resource file level 1. Production of goods and services = producción de bienes y servicios / Omar Villarreal, Marina Kirac},
	publisher = {Macmillan Heinemann ELT},
	year = {1999},
	address = {Oxford}
}