the Power of Public speaking
- ISBN 10 : 9792233547
- Judul : the Power of Public speaking
- Pengarang : Charles Bonar sirait,
- Penerbit : Pt. gramedia Pustaka
- Bahasa : Indonesia
- Tahun : 2007
- Halaman : 16
- Halaman : 16
- Google Book : https://drive.google.com/file/d/1xbnwZ2_IQ4VM3tJTFQt1ueLQeCCb8URn/view?usp=sharing
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