8. B2B. “Construction and maintenance.” Accessed on 25 February 2016. http://b2b-cambodia.com/b2b-construction-maintenance/
8. B2B.ការសាងសង់និងការថែទាំ. ចូលអានថ្ងៃទី២៥ កុម្ភៈ ២០១៦។http://b2b-cambodia.com/b2b-construction-maintenance/