Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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