This guide provides links to information resources useful to students enrolled in psychology courses, and students pursuing research projects in other courses that are on topics related to psychology
In any scientific field, it's important to provide evidence to support your statements. But not all evidence is equally reliable. Generally scientific research will involve carefully designed studies, with randomized controlled trials being one of the strongest types of research - while case reports and animal trials are considered much less strong (although they are still scientific). Click on the link below to find out more.
https://thelogicofscience.com/2016/01/12/the-hierarchy-of-evidence-is-the-studys-design-robust/
Always ask your instructor what citation style should be used for research projects. See below for links to helpful resources.
Publication Manual of the American Psychological Association by 
MLA Handbook by 
The Bedford Handbook by 