You asked:

who wrote mary poppins

  • Mary Poppins' authors are P. L. Travers, David Magee, Bill Walsh, Don DaGradi and Don DaGradi.
  • P. L. Travers
    P. L. Travers
    P. L. Travers

  • David Magee

  • Bill Walsh

  • Don DaGradi

  • Don DaGradi