Ooi, T. A. (2017). Bright future for tunnelling & underground space development. The Institution of Engineers, Malaysia (IEM).
استشهاد بنمط شيكاغوOoi, Teik Aun. Bright Future for Tunnelling & Underground Space Development. The Institution of Engineers, Malaysia (IEM), 2017.
MLA استشهادOoi, Teik Aun. Bright Future for Tunnelling & Underground Space Development. The Institution of Engineers, Malaysia (IEM), 2017.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.