Gupitasari, H. (2013). THE IMPLEMENTATION OF PROCESS-GENRE APPROACH TO TEACHING WRITING BUSINESS LETTER.
Čikaški stil citiranja (17. izdanje)Gupitasari, Hilda. THE IMPLEMENTATION OF PROCESS-GENRE APPROACH TO TEACHING WRITING BUSINESS LETTER. 2013.
MLA način citiranja (9. izdanje)Gupitasari, Hilda. THE IMPLEMENTATION OF PROCESS-GENRE APPROACH TO TEACHING WRITING BUSINESS LETTER. 2013.
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