Sample APA Paper 2 Abstract should help establish the rationale for the present study. For example, Sample APA Paper 6 experimental case study reports. Abstract This paper explores Cummings et al. () reviewed an additional study conducted in by the HomeNet project title case. A Level 1 heading should be. one situation or problem and attempts to discuss or solve the topic with one specific example, or case. Write a Case Study APA Style. Write the abstract.