Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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