APA-referens (7:e uppl.)

Armstrong, M., Spencer, E., Cairns, B., Banks, E., Pirie, K., Green, J., . . . Beral, V. (2011). Body mass index and physical activity in relation to the incidence of hip fracture in postmenopausal women.

Chicago-referens (17:e uppl.)

Armstrong, M., E. Spencer, B. Cairns, E. Banks, K. Pirie, J. Green, F. Wright, G. Reeves, och V. Beral. Body Mass Index and Physical Activity in Relation to the Incidence of Hip Fracture in Postmenopausal Women. 2011.

MLA-referens (9:e uppl.)

Armstrong, M., et al. Body Mass Index and Physical Activity in Relation to the Incidence of Hip Fracture in Postmenopausal Women. 2011.