Ask HN: Where can I learn about proposing software solutions?

As part of an interview, I have to figure out a solution, then present via an understandable format to technical and non-technical people. The format has to be documentation, and it can have diagrams. I have a solution, but am unsure on how to present it.

Is there a suggested reading or book I can use for ideas? It's something like a Software requirements specification (SRS), but I don't want to make it long (maybe max 1-2 pages), since it's not a complicated solution nor a full blown app.