Grant-Williams, Renee, author
Voice power: using your voice to captivate, persuade, and command attention
[American Management Association, ], 2002
 eBooks
Syed Imad Shah, author
The façade of voice opportunity and intragroup conflict / Syed Imad Shah, Asad Shahjehan, Bilal Afsar
University of Peshawar. Institute of Management Studies ; Hazara University. Department of Management Sciences, 2016
 Artikel Jurnal
McAfee, Barbara, author
Full voice: the art and practice of vocal presence
Berrett-Koehler, 2011
 Buku Teks
Hindradjid Harsono, author
Strategi bersaing dalam bisnis VoIP dengan pendekatan kompetensi inti. Studi kasus pada PT. XYZ
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2001
 UI - Tesis (Membership)
Klaiman, M.H.
Grammatical voice
Cambridge University Press , 1991
 Buku Teks
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