Arisanti, Bianda, Suwignyo Widagdo, and Dra. Yuniorita Indah H. “THE CONTRIBUTION OF ENVIRONMENTAL ASPECTS TO THE IMPROVEMENT OF EMPLOYEE PERFORMANCE”. Journal of Marketing and HR 9 (August 9, 2018): 488-495. Accessed April 22, 2019. http://scitecresearch.com/journals/index.php/jmhr/article/view/1580.