Snijders, T., Van der Gaag, M., Flap, H., & Erickson, N. L. a. B. (2008). Position generator measures and their relationship to other Social Capital measures. Oxford University Press.

Snijders, T., M. Van der Gaag, H. Flap, and Nan Lin and Bonnie Erickson. Position Generator Measures and Their Relationship to Other Social Capital Measures. Oxford University Press, 2008.

Snijders, T., et al. Position Generator Measures and Their Relationship to Other Social Capital Measures. Oxford University Press, 2008.