When filling in the book version, you can fill in the following format:

1, version: the first edition;

2. Version: Second Edition A;

3. Version: Second Edition B. The version of the book can be found on the copyright page of the book. The copyright page is usually located in the first few pages of a book, which contains the publication information and copyright information of the book. On the copyright page, the version information of books, such as the first edition and the second edition, is usually marked. If a book has multiple editions, you can add letters after the editions, such as the second edition A, the second edition B and so on.