Hamza, Pshdar Abdalla, Hawkar Anwar Hamad, Khowanas Saeed Qader, Bayar Gardi, and Dr. Govand Anwar. 2021. “Management of Outsourcing and Its Relationship With hotels’ Performance: An Empirical Analysis of Selected Hotels in Erbil”. International Journal of Advanced Engineering Research and Science 8 (10). https://journal-repository.com/index.php/ijaers/article/view/4201.