Grammarly
Grammarly Handbook: Comma Before And
This page focuses on the use of a comma before the word "and." It explains using a comma between items in a series with the use of "and" and before "and" when it is in front of an independent clause. Examples are provided.
Grammarly
Grammarly Blog: Oxford Comma
Rules and examples for using a comma before the conjunction in a list.
TED Talks
Ted: Ted Ed: Grammar's Great Divide: The Oxford Comma
If you read "Bob, a DJ and a clown" on a guest list, are three people coming to the party, or only one? That depends on whether you're for or against the Oxford comma- perhaps the most hotly contested punctuation mark of all time. When...