Warner, Tony, author
Communication skills for information systems
Pitman, 1996
 Buku Teks
Orey, Maureen, author
Communication skills training
American Society for Training and Development Press;, 2004
 eBooks
Orey, Maureen, author
Communication skills training
ATD Press, 2015
 Buku Teks
Iland, André, author
Soft skills : be professionally proactive / by André Iland
Iland Business Pages, 2013
 Buku Teks
Yuling Pan, author
Professional communication in international settings
Blackwell publishers, 2002
 Buku Teks
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