, I. (2013). The Effectiveness of Diversification in Reducing Investment Portfolio Risk. Journal of Research Diyala humanity, 35(112), 9-35.
Ilyas Kh. Al-Hamdooni . "The Effectiveness of Diversification in Reducing Investment Portfolio Risk". Journal of Research Diyala humanity, 35, 112, 2013, 9-35.
, I. (2013). 'The Effectiveness of Diversification in Reducing Investment Portfolio Risk', Journal of Research Diyala humanity, 35(112), pp. 9-35.
, I. The Effectiveness of Diversification in Reducing Investment Portfolio Risk. Journal of Research Diyala humanity, 2013; 35(112): 9-35.