You need a record of your sources so you can cite them at a later time. Two ways to do this are specialized computer applications, and preprinted templates. There are many computer programs on the market for genealogists. With these you simply enter the information as you gather it, then the program will print reports and charts as you wish. Ask around about which program is right for you.
Preprinted templates are available at some libraries.
If not, you can at least find out how to get them. Two popular templates are family group sheets and pedigree charts. That is, a husband, wife, and their children. Along with each person, you add their birth and death dates, and the places where these events occurred. For the husband and wife, you add the marriage date and place.