Gruber, H. E., & Hanley, E. N. (2002). Observations on morphologic changes in the aging and degenerating human disc: Secondary collagen alterations. BioMed Central.
استشهاد بنمط شيكاغوGruber, Helen E., و Edward N. Hanley. Observations On Morphologic Changes in the Aging and Degenerating Human Disc: Secondary Collagen Alterations. BioMed Central, 2002.
MLA استشهادGruber, Helen E., و Edward N. Hanley. Observations On Morphologic Changes in the Aging and Degenerating Human Disc: Secondary Collagen Alterations. BioMed Central, 2002.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.