Synthesis means combining your current knowledge with new components or elements to form new ideas, or in other words, thinking critically about the ideas of several authors, and then combining them with your own thoughts.
Keeping a reading log may help with consolidating your ideas.
In order to produce thorough research you need to:
Remember that content is more important than the delivery method; so no matter which delivery method is used, the audience must be able to follow the thoughts and arguments logically.
In most cases the assignment details will set out the format for presenting the information in a particular way. Below are some examples of different type of formats that might be used.
Student Learning's Moodle course - Writing (requires log-in)