Gaya APA
Sugiantoro, R. (2001).
Tourism, Trade, Investment: Yogya Dalam Bingkai Otonomi .
Yogyakarta:
Bigraf Publishing.
Gaya MLA
Sugiantoro, Ronny.
"Tourism, Trade, Investment: Yogya Dalam Bingkai Otonomi".
Yogyakarta:
Bigraf Publishing,
2001.
Text.