Which source would be the most credible choice for researching life of Anne Frank?

The most credible choice for researching the life of Anne Frank would be a reputable biography or historical account written by a historian or biographer who has thoroughly researched the subject. This type of source would be based on extensive research, including interviews with people who knew Anne Frank, analysis of her diary, and examination of historical documents and records. It would provide a comprehensive and accurate account of her life, while avoiding potential biases or sensationalism that may be found in other sources.