Miftahul Jannah
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2019
UI - Tesis (Membership)
Stubbs, Michael
Blackwell, 1996
Buku Teks
Kirk, Cheryl
McGraw-Hill, 1997
Buku Referensi
Mann, Thomas
Vintage International , 1995
Buku Teks
Lindsay, Norman
Angus & Robertson Publishers, 1918
Buku Teks