Peitgen, H., & Jurgens, H. .. a. (1991). Fractals for the classroom. Springer-Verlag.
Dyfyniad Arddull ChicagoPeitgen, Heinz-otto, and Harmut ...[et al.] Jurgens. Fractals for the Classroom. New York: Springer-Verlag, 1991.
Dyfyniad MLAPeitgen, Heinz-otto, and Harmut ...[et al.] Jurgens. Fractals for the Classroom. Springer-Verlag, 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.