Cita APA (7a ed.)

ECPA. Summer School, Greenman, J., & Fryer, M. (1980). Mathematics for social scientists. [s.n.].

Cita Chicago Style (17a ed.)

ECPA. Summer School, J.V Greenman, y M.J Fryer. Mathematics for Social Scientists. [S.l.]: [s.n.], 1980.

Cita MLA (9a ed.)

ECPA. Summer School, et al. Mathematics for Social Scientists. [s.n.], 1980.