Yan, G. (2015). WWF working to certify Philippine tuna fisheries by 2016. AmCham Philippines Business Journal.
Chicago-referens (17:e uppl.)Yan, Greg. "WWF Working to Certify Philippine Tuna Fisheries by 2016." AmCham Philippines Business Journal 2015.
MLA-referens (9:e uppl.)Yan, Greg. "WWF Working to Certify Philippine Tuna Fisheries by 2016." AmCham Philippines Business Journal, 2015.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.