The correct method of documenting a source using MLA format is "This technology was first introduced back in the seventies (Hamilton 83)," option B.
<h3>How to document a source in MLA style?</h3>
First, we must pay attention to whether or not the citation already contains the name of the author. If it does, there is no need to place the name in parentheses. Thus, we can eliminate options A and C.
Second, we must see if the page number is mentioned in parentheses. It should be placed after the author's name, without a comma separating them. Thus, we can eliminate option D.
With the information above in mind, we can choose option B as the correct answer, "This technology was first introduced back in the seventies (Hamilton 83)."
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Answer:
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1) N₂ (gas) ; that is, nitrogen (gas) ; (about 78%);
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and:
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2) O₂ (gas) ; that is, oxygen (gas); (about 21%);
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followed by argon, carbon dioxide, and others.
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