Unto others :
the evolution and psychology of unselfish behavior /
Elliott Sober, David Sloan Wilson.
APA Citation
Sober, E., Wilson, D. Sloan. (1998). Unto others: the evolution and psychology of unselfish behavior. Cambridge, Mass.: Harvard University Press.
MLA Citation
Sober, Elliott, and David Sloan Wilson. Unto Others: the Evolution And Psychology of Unselfish Behavior. Cambridge, Mass.: Harvard University Press, 1998.
Warning: These citations may not always be complete (especially for serials).