Gaya APA
Kuivenhoven, P., Boerma, J. (1992).
Assessment on eco-tourism potential in the State of Selangor, Malaysia .
:
AWB - Malaysia.
Gaya MLA
Kuivenhoven, P.., Boerma, J..
"Assessment on eco-tourism potential in the State of Selangor, Malaysia".
:
AWB - Malaysia,
1992.
Text.