Kien, P.
(2017).
 Researching the relationship between operational efficiency with profitability of telecommunication technology joint-stock companies..
<em>VNU JOURNAL OF ECONOMICS AND BUSINESS, 33</em>(2).
Retrieved from <a href="https://js.vnu.edu.vn/EAB/article/view/4069" target="_new">https://js.vnu.edu.vn/EAB/article/view/4069</a>