Lua APA (7ú heag.)

De Guzman, D. (1997). Guide for effective study. Manila Bulletin.

Lua i Stíl Chicago (17ú heag.)

De Guzman, Desiderio. "Guide for Effective Study." Manila Bulletin 1997.

Lua MLA (9ú heag.)

De Guzman, Desiderio. "Guide for Effective Study." Manila Bulletin, 1997.

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