Cita APA

Campbell, C. M., & Robertson, E. F. (1982). Groups -St. Andrews 1981. Cambridge University.

Citación estilo Chicago

Campbell, C. M., and E. F. Robertson. Groups -St. Andrews 1981. Cambridge: Cambridge University, 1982.

Cita MLA

Campbell, C. M., and E. F. Robertson. Groups -St. Andrews 1981. Cambridge University, 1982.