Gray, H. P. (2018). Tourism as a source of foreign exchange. The Institute Of National Planning.
Chicago-referens (17:e uppl.)Gray, H. Peter. Tourism as a Source of Foreign Exchange. The Institute Of National Planning, 2018.
MLA-referens (9:e uppl.)Gray, H. Peter. Tourism as a Source of Foreign Exchange. The Institute Of National Planning, 2018.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.