Sofia Ehsan. Valuation of geotourism: A case study of Langkawi Global Geopark.
Chicago Style (17th ed.) CitationSofia Ehsan. Valuation of Geotourism: A Case Study of Langkawi Global Geopark.
MLA引文Sofia Ehsan. Valuation of Geotourism: A Case Study of Langkawi Global Geopark.
警告：这些引文格式不一定是100％准确.