Create a PCB scheme for circuit
Those schematics look like they are all from different sources so you have a long way to go still. The basic steps are:

1) Pick a CAD package. Eagle is very popular in the home/hobby market and so there are lots of tutorials around on how to use it. There are however lots of other choices, don't ask whats best because that a) is opinion based and so off topic and b) depends a lot on what you are doing and what you are used to.

2) Pick specific components. Do you want surface mount or through hole? If surface mount which size, it makes sense to standardize where possible e.g. 0805 or 0603 for all of the Rs and Cs, TSOP or SOIC for ICs. You may want to be a little lazy any check that you are picking parts that you can find libraries for in your CAD package, using your second choice of part/package to avoid having to create library symbols for your first choice is a good idea when first learning the CAD systems.

3) Enter your 4 schematics into the CAD package as a single design specifying the correct parts and packages. Get this wrong and your board will be wrong. Take care that if you want the power or grounds on them to be separate then ensure they have different names. 

4) Pass the schematic into the layout part of the CAD system. Make sure you set the board to the correct number of layers (2 is the cheapest) and check that any design rules for minimum spacings are the same or larger than your planned PCB producer requires. You will now have a ratsnest of parts and connections in front of you. Use the CAD package to layout the parts to give the cleanest interconnect possible and then route the traces.

5) When done generate the GERBER files and a drill file, these are the files the PCB house will use to produce the board. You need one gerber file per process layer (e.g. top copper, top soldermask, and top silkscreen and the same for the bottom layer. Inner layers are a single copper layer file). As a sanity check you may want to view these directly. Personally I use a program called GCPrevue to view them and ensure everything is correct but there are other options.

Easy ;-)