Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Oliver Hazard Perry:

"

In 1819, Perry sailed for the Orinoco River, Venezuela, aboard of the frigate John Adams with the frigate Constellation and the schooner USS Nonsuch, arriving on July 15 to discourage piracy, while still maintaining friendly relations with Republic of Venezuela and the Republic of Buenos Aires. Shifting his flag to USS Nonsuch, due to its shallower draft, Perry sailed upriver to Angostura to negotiate an anti-piracy agreement with President Simón Bolívar. A favorable treaty was signed on August 11 with Vice-President Francisco Antonio Zea in the absence of Bolivar (who was engaged in the liberation of New Granada), but when the schooner started downriver, many of her crew, including Perry, had been stricken with yellow fever.[citation needed]