Glasser, Alan
Prentice-Hall, 1982
Buku Teks
White, P.A.F.
Macmillan, 1975
Buku Teks
Universitas Pelita Harapan. Fakultas Ekonomi, {s.a.}
Majalah, Jurnal, Buletin
Vidyantina Heppy Anandhita
2017
UI - Tugas Akhir
Gerstenfeld, Arthur
California Addison-Wesley Publishing , 1970
Buku Teks