The Pool at Billabong Hostel
The Billabong Hotel's pool is referenced by expert writers. Of the 3 publications that we tracked, 3 referenced the pool, such as Lonely Planet, DK Eyewitness and Rough Guide.
Billabong Hostel 
 Lonely Planet
 DK Eyewitness
 Rough Guide
 "Aim for the ground-level pool-view rooms, which have private verandas and more space compared with rooms at the back" 
 "Set in an idyllic tropical garden with a large free-form salt-water swimming pool, Billabong is a 10-minute walk
from the Mekong River and the Central Market" 
 "An unassuming small hotel with a range of comfortable, en-suite a/c rooms (all with TV), including quad-share family rooms, helpful management and a nice pool"