Italics are equivalent to underlining.
Quotation Marks
No, Italics.
Traditionally, you would use italics rather than quotation marks. However, it is a stylistic choice. For academic writing though, stick with italics to emphasize words.
You can spell it as a capital letter A, or with quotation marks "a" or in italics a to distinguish it from the indefinite article.You would normally not use the phonetic spelling, which is ay.
If a word is in quotation marks, and you're quoting it, use single quotation marks to indicate an embedded quotation.
Italics
Quotation Marks
Italics.
Essays require quotation marks.
No, Italics.
Scripture can be quoted in either italics or quotation marks, depending on the style guide being followed. It is important to be consistent within a document or publication.
Movie titles require either italics or underlining.
No. Use italics or underline (I believe italics is the most current format).
It should be italicized.
Yes, either quotation marks or italics are good.
Before we had italics, it had to be quotation marks, but now, I think italics is sufficient, particularly if you are referring to it as a source. Maybe different rules for published treatises.
Generally, company names are not italicized or enclosed in quotation marks. Product names are often capitalized but can be italicized or enclosed in quotation marks when emphasizing them in a sentence.