Gaya APA
Williams, R. et al (2010).
Insight guides hongkong step by step : 18 rencana perjalanan khusus .
jakarta:
elex media komputindo.
Gaya MLA
Williams, Ruth. et al.
"Insight guides hongkong step by step : 18 rencana perjalanan khusus".
jakarta:
elex media komputindo,
2010.
Transparency.