International Society for Study of the Lumbar Spine & Herkowitz, H. N. (2004). The lumbar spine (Third edition.). Lippincott Williams & Wilkins.
Lua i Stíl Chicago (17ú heag.)International Society for Study of the Lumbar Spine agus Harry N. Herkowitz. The Lumbar Spine. Third edition. Philadelphia: Lippincott Williams & Wilkins, 2004.
Lua MLA (9ú heag.)International Society for Study of the Lumbar Spine agus Harry N. Herkowitz. The Lumbar Spine. Third edition. Lippincott Williams & Wilkins, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.