"Yemen: over 100 dead in suicide bombings at Houthi mosques in Sana'a", by The Guardian Hakim Almasmari & Asa Fitch (20 March 2015).
2015년 3월 20일에 확인함.  "Yemen: over 100 dead in suicide bombings at Houthi mosques in Sana'a", by The Guardian Hakim Almasmari and Asa Fitch (2015년 3월 20일).