Lua APA (7ú heag.)

Zobel de Ayala, J. A., II. (1998). The challenge of leadership in a democracy. Today.

Lua i Stíl Chicago (17ú heag.)

Zobel de Ayala, Jaime Augusto, II. "The Challenge of Leadership in a Democracy." Today 1998.

Lua MLA (9ú heag.)

Zobel de Ayala, Jaime Augusto, II. "The Challenge of Leadership in a Democracy." Today, 1998.

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