What’s the Best Way to Prepare for the American Nurses Credentialing Center (ANCC) Psychiatric Mental Health Nurse Practitioner Exam? Please note the following requirements: A minimum of 150 words, scholarly written, APA formatted. A minimum of 2 references are required. Peer reviewed scholarly resources should be no more than 5 years old. Example: professional, peer reviewed publications or reports from resources such as CDC, IOM, AACN, etc. These should be written by professionals and scholars in the field. Websites are only scholarly, if written by professionals and experts in the area. Wikipedia is not a scholarly source, for example. A website such as Medscape, CDC, and TIGER Initiative are examples of scholarly sources.