1. AAPA. 2013. Port Industry Statistics—World Port Rankings 2013. American Association of Port Authorities.
2. Ahmad, Z., Ishak, A.K., 2007. Marine Environment Monitoring Programmes in Malaysia. Country Report—Malaysia (www.rcaro.org/attach/filedownloads/do_down/no/11769).
3. ASEAN. 2008. ASEAN Marine water quality: management guidelines and monitoring manual, p. 444.
4. Singapore old straits and new harbour;Barnes;J. Straits Branch R. Asiat. Soc.,1911
5. Endocrine disrupting alkylphenols and bisphenol-A in coastal waters and supermarket seafood from Singapore;Basheer;Mar. Pollut. Bull.,2004