As you are completing your research, you should be keeping track of all of the websites that you visited, plus all of the books and articles you have read. Each time you directly quote, paraphrase, or use another person's thoughts or ideas you must cite them in the body of your essay as well as add them to a reference list that will appear at the end of your essay. Your reference page must be in alphabetical order.
This video from California State University reviews the structure of a reference page and in text citations in APA:
Next install one of the following citation tools on your google account.
Process to install citation tool:
Go to waffle at the top RH (right hand) corner of your screen
Click on it and go down to the very bottom and click on more from Google Workspace
Next find the Education section on the LH (left hand) side of screen and click on Academic Resources
Now find MyBib and install it on your account. Just follow the prompts.
MyBib will appear in the waffle just like Google docs, meets, sheets etc. does.
This video by Richard Byrne gives a general overview of MyBib.
It is very important that you verify that the information that has been entered into the citation tool is accurate. This may require you to return to the website to find information. It is very easy for you classroom teacher to verify your accuracy as well as the accuracy of your reference page.
This video from Purdue University will highlight the criteria needed for basic APA formatting: