Most often, commas and periods go within the quotation marks, but there are some forms of punctuation and examples that go outside of ... parenthetical citation at the end of the sentence. With a ...

Six-mark questions may be synoptic questions, which bring together ideas from two or more topics. For example, a question about fertilisers could include ideas about covalent substances ...

Six-mark questions may be synoptic questions. These questions bring together ideas from two or more topics. For example, a question about fertilisers could include ideas about covalent substances ...