To cite items from Bone Abstracts, please make sure you include the names of the authors, year of publication, abstract title and, most importantly, the fact that it is from Bone Abstracts, with volume and abstract number. You may also wish to include the name of the conference.
For example:
McCardle A 2013 Skeletal muscle loss: sarcopenia and inactivity. Presented at the European Calcified Tissue Society Conference ECTS 2013 , Lisbon, Portugal. Bone Abstracts Vol 1, S2.1 (doi: 10.1530/boneabs.1.S2.1)