Herry Sofiandy Halim
Penerbit Universitas Trisakti, 2006
Buku Teks SO
Artikel Jurnal
Dofka, Charline M.
Delmar Cengage Learning, 2007
Buku Teks SO
editor, Mark Greenwood, Ian Corbett ; penerjemah, Harmas Yazid Yusuf, Abel Tasman Yuza, Nani Murniati ; editor, Dewi Nurul Mustaqimah
EGC, 2017
Buku Teks SO
Dofka, Charline M.
Delmar Cengage Learning, 2013
Buku Teks SO