Verhoef, Esther
Anthos, 2010
Buku Teks
Nelson, Gideon E.
John Wiley & Sons, 1974
Buku Teks
by Luzviminda Casapao [and others]
Barron's Educational Series, 1983
Buku Teks
[Fakultas Ekonomi UI, Fakultas Ekonomi dan Bisnis Universitas Indonesia], 2009
Artikel Jurnal
Nelson, Gideon E.
John Wiley & Sons, 1984
Buku Teks