APA (7th ed.) Citation

Powers, R. (2010). MARK TWAIN IN LOVE. Smithsonian, 41(2), 78.

Chicago Style (17th ed.) Citation

Powers, Ron. "MARK TWAIN IN LOVE." Smithsonian 41, no. 2 (2010): 78.

MLA (9th ed.) Citation

Powers, Ron. "MARK TWAIN IN LOVE." Smithsonian, vol. 41, no. 2, 2010, p. 78.