Robinson, M. M. S. (2007). Pacific coasts of central america and united states pilot NP 8: Pacific coasts of panama (west of punta mariato), Costa Rica including Isla del Coco, Nicaragua, Honduras, El salvador, Guatemala, Mexíco and united states of ameria; off-lying islands between latitudes 4° N and 48° 25 N (11th edición.). The United Kingdom hydrographic office.
Chicago Style (17th ed.) CitationRobinson, Mr M. S. Pacific Coasts of Central America and United States Pilot NP 8: Pacific Coasts of Panama (west of Punta Mariato), Costa Rica Including Isla Del Coco, Nicaragua, Honduras, El Salvador, Guatemala, Mexíco and United States of Ameria; Off-lying Islands Between Latitudes 4° N and 48° 25 N. 11th edición. Taunton, Somerset: The United Kingdom hydrographic office, 2007.
MLA (9th ed.) CitationRobinson, Mr M. S. Pacific Coasts of Central America and United States Pilot NP 8: Pacific Coasts of Panama (west of Punta Mariato), Costa Rica Including Isla Del Coco, Nicaragua, Honduras, El Salvador, Guatemala, Mexíco and United States of Ameria; Off-lying Islands Between Latitudes 4° N and 48° 25 N. 11th edición. The United Kingdom hydrographic office, 2007.