Ilagan, A. R. (2012). Light and laughter underground: Puerto Princesa underwater river attracts large number of tourists. Cruising.
Chicago (17e ed.) BronvermeldingIlagan, Aris R. "Light and Laughter Underground: Puerto Princesa Underwater River Attracts Large Number of Tourists." Cruising 2012.
MLA (9e ed.) BronvermeldingIlagan, Aris R. "Light and Laughter Underground: Puerto Princesa Underwater River Attracts Large Number of Tourists." Cruising, 2012.
Let op: Deze citaties zijn niet altijd 100% accuraat.