请分别生成几篇python的MySQL操作、scoket通信、flask框架、html、css、javas的参考文献，请以标准格式给出

MySQL操作参考文献：
1. "MySQL :: MySQL 8.0 Reference Manual :: 13.2.5.2 INSERT Statement," MySQL, accessed September 21, 2021, https://dev.mysql.com/doc/refman/8.0/en/insert.html.
2. "MySQL :: MySQL 8.0 Reference Manual :: 13.2.9 SELECT Statement," MySQL, accessed September 21, 2021, https://dev.mysql.com/doc/refman/8.0/en/select.html.
3. "MySQL :: MySQL 8.0 Reference Manual :: 13.2.10 UPDATE Statement," MySQL, accessed September 21, 2021, https://dev.mysql.com/doc/refman/8.0/en/update.html.

Socket通信参考文献：
1. "Socket Programming in Python (Guide)," Real Python, accessed September 21, 2021, https://realpython.com/python-sockets/.
2. "Python Socket Programming Tutorial," Guru99, accessed September 21, 2021, https://www.guru99.com/python-socket-programming-tutorial.html.
3. "Python Network Programming - TCP/IP Socket Programming," Tutorialspoint, accessed September 21, 2021, https://www.tutorialspoint.com/python_network_programming/python_socket_programming.htm.

Flask框架参考文献：
1. "Flask Documentation (2.1.x)," Flask, accessed September 21, 2021, https://flask.palletsprojects.com/en/2.1.x/.
2. "Flask Mega-Tutorial Part I: Hello, World!," Miguel Grinberg, accessed September 21, 2021, https://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-i-hello-world.
3. "Flask Web Development with Python Tutorial - Full Course," FreeCodeCamp, accessed September 21, 2021, https://www.youtube.com/watch?v=MwZwr5Tvyxo.

HTML参考文献：
1. "HTML5," W3C, accessed September 21, 2021, https://www.w3.org/TR/html5/.
2. "HTML Tutorial," W3Schools, accessed September 21, 2021, https://www.w3schools.com/html/.
3. "HTML Cheatsheet," OverAPI, accessed September 21, 2021, https://overapi.com/html-dom/.

CSS参考文献：
1. "CSS," W3C, accessed September 21, 2021, https://www.w3.org/Style/CSS/.
2. "CSS Tutorial," W3Schools, accessed September 21, 2021, https://www.w3schools.com/css/.
3. "CSS Cheatsheet," OverAPI, accessed September 21, 2021, https://overapi.com/css/.

JavaScript参考文献：
1. "ECMAScript® 2021 Language Specification," ECMA International, accessed September 21, 2021, https://tc39.es/ecma262/.
2. "JavaScript Tutorial," W3Schools, accessed September 21, 2021, https://www.w3schools.com/js/.
3. "JavaScript Cheatsheet," OverAPI, accessed September 21, 2021, https://overapi.com/javascript/.