benefits and drawbacks of research designs, psychology homework help

For this paper I need help with an introduction, conclusion, examples, in text citations (APA 6th edition) with the 3 research designs I put in the paper. This is the question:

Describe in depth three (3) of the following research designs frequently used in Applied Behavior Analysis: reversal/withdrawal designs, alternating treatment designs, multiple baseline designs, changing criterion designs. Compare and contrast the benefits and drawbacks of each of your three (3) choices with the issues of internal validity, external validity and social validity in mind. For each design that you select, give one example of a behavioral program or intervention that could be monitored or changed through the use of the design selected. Be sure to use a different type of setting for each example (e.g. – a mental health clinic, an educational setting (School), a group home, etc.). Conclude with a brief discussion regarding the ethical, legal, individual and socio-cultural implications of the behavioral program that you described. Be sure to provide both in-text citations and a final reference page as per APA style to support your answers throughout the paper.

I have done some work as you will see, I just need some additional assistance.