APA (7th ed.) Citation

Wright, H. (1931). The sex factor in marriage: A book for those who are or are about to be married. The Vanguard press.

Chicago Style (17th ed.) Citation

Wright, Helena. The Sex Factor in Marriage: A Book for Those Who Are or Are About to Be Married. New York: The Vanguard press, 1931.

MLA (9th ed.) Citation

Wright, Helena. The Sex Factor in Marriage: A Book for Those Who Are or Are About to Be Married. The Vanguard press, 1931.