If you need to write a logline and deliver a pitch to an editor or agent the websites below are additional sources for study.
Ray Anne Carr gives some tips on how she develops a logline and pitch.
"I WROTE A 120 PAGE SCRIPT BUT CAN’T WRITE A LOGLINE: THE CONSTRUCTION OF A LOGLINE"
This is an indepth article on the subject.
This is a site with agents and you can submit a pitch to be evaluated by them.