Artikel Jurnal
Gatot Efrianto, author
The Ary Suta Center Series on Strategic Management, 2015
Artikel Jurnal
Boas, Gideon, author
Edward Elgar Publishing, 2017
Buku Teks
Gultom, Erikson Hasiholan, author
Tatanusa, 2006
Buku Teks
by Robert Cryer ... [and others]
Cambridge University Press, 2016
Buku Teks