(c) To turn to in the sense of to address, appeal to, have recourse to is rendered dirigirse a. Where the appeal is specifically for help, recurrir a may be used.
"Now you have heard it," he continued, turning to the young lady.
Ya lo ha oido Vd.,—prosiguió dirigiéndose a la señorita.
—JOSÉ MÁRMOL.
Since my family will not help me, I turn to my friends.
Ya que mi familia no quiere ayudarme, me dirijo a mis amigos.
(d) To turn over (invert) is invertir; meaning to revolve it is revolver.
When he turned the plate over he found what had been hidden.
Al invertir el plato halló lo escondido.
But, man alive, I can hardly turn over myself!