Chicago: U.S. Supreme Court, "Syllabus," Helvering v. American Chicle Co., 291 U.S. 426 (1934) in 291 U.S. 426 291 U.S. 427–291 U.S. 428. Original Sources, accessed April 17, 2025, http://originalsources.com/Document.aspx?DocID=73JXNK88SSIYTGB.
MLA: U.S. Supreme Court. "Syllabus." Helvering v. American Chicle Co., 291 U.S. 426 (1934), in 291 U.S. 426, pp. 291 U.S. 427–291 U.S. 428. Original Sources. 17 Apr. 2025. http://originalsources.com/Document.aspx?DocID=73JXNK88SSIYTGB.
Harvard: U.S. Supreme Court, 'Syllabus' in Helvering v. American Chicle Co., 291 U.S. 426 (1934). cited in 1934, 291 U.S. 426, pp.291 U.S. 427–291 U.S. 428. Original Sources, retrieved 17 April 2025, from http://originalsources.com/Document.aspx?DocID=73JXNK88SSIYTGB.