Andi, Andi, Wahyu Kurniawan Santoso, and Ronald Chandra Tali. 2004. “BASIC ACTUAL AND EFFECTIVENESS OF LEADERSHIP STYLES OF CONSTRUCTION PROJECT MANAGERS IN SURABAYA”. Civil Engineering Dimension 6 (1):pp. 32-39. https://doi.org/10.9744/ced.6.1.pp. 32-39.