In a bibliography, how are sources typically organized?

• A. Sources Are Listed Alphabetically By Title.
• B. Sources Are Listed By Category According To Primary Or Secondary.
• C. Sources Are Grouped By Publication Year.
• D. Sources Are Ordered By Length.

Answer: (B)

Distinguishing primary sources from secondary sources is a common way to organize a bibliography because it clarifies the kind of material you’re citing and how it’s being used in the research. Primary sources are the original materials—things like original experiments, data sets, historical documents, or firsthand accounts. Secondary sources interpret or analyze those originals—reviews, summaries, critical analyses, or syntheses of other works. By grouping entries into these two categories, readers can quickly tell where the evidence comes from and where to look for direct sources versus commentary about those sources. This approach is especially useful in annotated bibliographies or literature reviews, where the aim is to compare original material with scholarly interpretations. Other organizational schemes—like arranging by title, year, or length—don’t convey the source’s nature as clearly and aren’t as informative about how the sources relate to the research question.