Cita APA (7a ed.)

Evans, D. (1977). Mathematics: Friend or foen. Allen and Unwin.

Cita Chicago Style (17a ed.)

Evans, Dorothy. Mathematics: Friend or Foen. London: Allen and Unwin, 1977.

Cita MLA (9a ed.)

Evans, Dorothy. Mathematics: Friend or Foen. Allen and Unwin, 1977.