International economics 
Salvatore, Dominick. 
 - Thirteenth editon. 
 -  John Wiley & Sons Inc.  2020 
 - xxxviii, 619 pages 
978-1-11955492-9
International economics.
GS 337 S18 2020
                        978-1-11955492-9
International economics.
GS 337 S18 2020