Parrington, V. L. (1927). Main currents in American thought: An interpretation of American literature from the beginnings to 1920. [Harcourt, Brace].
Chicago Style (17th ed.) CitationParrington, Vernon Louis. Main Currents in American Thought: An Interpretation of American Literature from the Beginnings to 1920. [New York]: [Harcourt, Brace], 1927.
MLA (9th ed.) CitationParrington, Vernon Louis. Main Currents in American Thought: An Interpretation of American Literature from the Beginnings to 1920. [Harcourt, Brace], 1927.
Warning: These citations may not always be 100% accurate.