| entry at The World Factbook• May 11, 2012 9:23 AM CT• Singapore; Portland, Oregon: Times Media Private Limited | A Guide to Customs and Etiquette |
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| Michael Deaves February 27, 2013 | : "Middle East business news and analysis, tenders, contracts awarded, commentary, economic data, insight, projects and events" — magazine website• Wael Mahdi and Marc Roca |
Anthony, Craig 12 September 2016.
6| Tariffs applied by Saudi Arabia as provided by ITC's , an online database of customs tariffs and market requirements• International Relations Council of Turkey | Louis Boisgibault, Fahad Al Kabbani 2020 : |
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| Jones, Rory; Said, Summer 2018-09-30 |
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