Lua APA (7ú heag.)

Oplas, B. J. (2006). Why income taxes can be abolished. Philippine Collegian.

Lua i Stíl Chicago (17ú heag.)

Oplas, Bienvenido Jr. "Why Income Taxes Can Be Abolished." Philippine Collegian 2006.

Lua MLA (9ú heag.)

Oplas, Bienvenido Jr. "Why Income Taxes Can Be Abolished." Philippine Collegian, 2006.

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