(2011). Puerto Princesa River makes it to new seven natural wonders list. The Sunday Times.
Citación estilo Chicago"Puerto Princesa River Makes It to New Seven Natural Wonders List." The Sunday Times 2011.
Cita MLA"Puerto Princesa River Makes It to New Seven Natural Wonders List." The Sunday Times, 2011.
Warning: These citations may not always be 100% accurate.