Sumarno, S., Panjaitan, T.W.S. and Rolalisasi, A. 2025. An Impact Analysis of Retrofit Shading and Double Skin Facade on Building Performance at the Glass Office of PT Pertamina Patra Niaga - ITJ Jakarta. INTERNATIONAL JOURNAL ON ADVANCED TECHNOLOGY, ENGINEERING, AND INFORMATION SYSTEM. 4, 3 (Dec. 2025), 482–500. DOI:https://doi.org/10.55047/ijateis.v4i3.2014.