SIMANJUNTAK, H. (1997). English for receptionist. Kesaint Blanck.
Lua i Stíl Chicago (17ú heag.)SIMANJUNTAK, Herpinus. English for Receptionist. Jakarta: Kesaint Blanck, 1997.
Lua MLA (9ú heag.)SIMANJUNTAK, Herpinus. English for Receptionist. Kesaint Blanck, 1997.
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