What source would be the most credible choice for researching Mozart's music?

The most credible source for researching Mozart's music would be scholarly articles published in peer-reviewed musicology journals, such as "The Journal of the American Musicological Society." Additionally, authoritative books by respected music historians, such as "Mozart: A Life" by Paul Johnson or "Mozart" by Maynard Solomon, can provide in-depth analysis and context. Online databases like JSTOR or the Oxford Music Online can also offer reliable access to academic publications and resources on Mozart's work.