Kenneth D. Benne and Paul Sheats. Functional Roles of Group Members. Journal of Social Issues, 4(2):41–49, April 1948. doi:10.1111/j.1540-4560.1948.tb01783.x.
@article{benne_functional_1948,
author = {Benne, Kenneth D. and Sheats, Paul},
doi = {10.1111/j.1540-4560.1948.tb01783.x},
issn = {1540-4560},
journal = {Journal of Social Issues},
language = {en},
month = {April},
number = {2},
pages = {41-49},
title = {Functional {{Roles}} of {{Group Members}}},
volume = {4},
year = {1948}
}