Spencer, S. (2009). The Heart of leadership. Bhuana Ilmu Populer.
Chicagoスタイル(17版)引用形式Spencer, Sabina. The Heart of Leadership. Bhuana Ilmu Populer, 2009.
MLA(8版)引用形式Spencer, Sabina. The Heart of Leadership. Bhuana Ilmu Populer, 2009.
警告: この引用は必ずしも正確ではありません.