Gaya APA
Idris, G, S. (2009).
Brand association attributes for Indonesian National Airline .
Surabaya:
Fak.Ekonomi - Universitas Surabaya.
Gaya MLA
Idris, GAUTAMA, SO,.
"Brand association attributes for Indonesian National Airline".
Surabaya:
Fak.Ekonomi - Universitas Surabaya,
2009.
Artikel.