Rivera, M. A. K. L. (2004). The tax effect. Philippine Collegian.
Lua i Stíl Chicago (17ú heag.)Rivera, Ma. Anna Krynessa L. "The Tax Effect." Philippine Collegian 2004.
Lua MLA (9ú heag.)Rivera, Ma. Anna Krynessa L. "The Tax Effect." Philippine Collegian, 2004.
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