Broadhead, W. E., Kaplan, B. H., James, S. A., Wagner, E. H., Schoenbach, V. J., Grimson, R., … Gehlbach, S. H. (1983). The epidemiologic evidence for a relationship between social support and health. American Journal of Epidemiology, 117(5), 521–537. https://doi.org/10.1093/oxfordjournals.aje.a113575

Broadhead, W. E., B. H. Kaplan, S. A. James, E. H. Wagner, V. J. Schoenbach, R. Grimson, S. Heyden, G. Tibblin, and S. H. Gehlbach. “The epidemiologic evidence for a relationship between social support and health.” American Journal of Epidemiology 117, no. 5 (May 1983): 521–37. https://doi.org/10.1093/oxfordjournals.aje.a113575.

Broadhead WE, Kaplan BH, James SA, Wagner EH, Schoenbach VJ, Grimson R, et al. The epidemiologic evidence for a relationship between social support and health. American journal of epidemiology. 1983 May;117(5):521–37.

Broadhead, W. E., et al. “The epidemiologic evidence for a relationship between social support and health.” American Journal of Epidemiology, vol. 117, no. 5, May 1983, pp. 521–37. Epmc, doi:10.1093/oxfordjournals.aje.a113575.

Broadhead WE, Kaplan BH, James SA, Wagner EH, Schoenbach VJ, Grimson R, Heyden S, Tibblin G, Gehlbach SH. The epidemiologic evidence for a relationship between social support and health. American journal of epidemiology. 1983 May;117(5):521–537.