APA (7th ed.) Citation

Roberts, S., Wilson, R., Fedurek, P., & Dunbar, R. (2008). Individual differences and personal social network size and structure.

Chicago Style (17th ed.) Citation

Roberts, S., R. Wilson, P. Fedurek, and R. Dunbar. Individual Differences and Personal Social Network Size and Structure. 2008.

MLA (9th ed.) Citation

Roberts, S., et al. Individual Differences and Personal Social Network Size and Structure. 2008.