No, you can't number sentences in APA style writing.
View page
No, underlining headings is not acceptable in APA style. Instead, headings should be formatted using bold or italics.
View page
In APA style, you should title the page "References."
View page
Websites such as Purdue OWL, APA Style, and EasyBib offer comprehensive guidelines and examples for APA style formatting, citations, and references. These sources can help you understand and apply APA style rules correctly in your academic writing.