Dyfyniad APA

Rudoffer, S., & Baker, I. N. (1967). Mathematics observed. Hans Freudenthal.

Dyfyniad Arddull Chicago

Rudoffer, Stephen, and I N. Baker. Mathematics Observed. London: Hans Freudenthal, 1967.

Dyfyniad MLA

Rudoffer, Stephen, and I N. Baker. Mathematics Observed. Hans Freudenthal, 1967.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.