Problem: A credible source for this class includes your textbook, other materials in the class, APA or ACA websites, or anything in the library. Do not use websites unless you ask first. Do NOT use simply psychology or similar in this class -- they are superficial and often do not give credit to original authors -- they are high school level, not grad school. Answer this question in 100 words or more, what do we mean by "credible source" and why would credible sources be important in developmental psychology?