Karunungan, R. E. (1966). Transfer and business taxes (Rev. ed.). Imprenta Los Filipinos.
Lua i Stíl Chicago (17ú heag.)Karunungan, Ruben E. Transfer and Business Taxes. Rev. ed. Manila: Imprenta Los Filipinos, 1966.
Lua MLA (9ú heag.)Karunungan, Ruben E. Transfer and Business Taxes. Rev. ed. Imprenta Los Filipinos, 1966.
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