McManus; Thia-Eng, Chua (1990). Liana T. (ed.). The Coastal Environmental Profile of Lingayen Gulf, Philippines. Manila, Philippines: Published by International Center for Living Aquatic Resources Management on behalf of the Association of Southeast Asian Nations/United States Coastal Resources Management Project. p. 2. ISBN9789711022495. נבדק ב-4 בפברואר 2016. {{cite book}}: (עזרה)
