According to the text,there are three types of external sources: personal,marketing,and secondary.

Question

Quizplus · Accepted Answer

The text does not specify the types of external sources, but typically, external sources are categorized differently, such as personal, public, commercial, and internal or external secondary sources. The categorization into personal, marketing, and secondary is not a standard classification for external sources.

According to the Text,there Are Three Types of External Sources