Hartman, G. (1931). The World We Live in and How it Came to be: A pictured outline of man's progress from the earliest days to the present. The Macmillian Company.
Chicago Style (17th ed.) CitationHartman, Gertrude. The World We Live in and How It Came to Be: A Pictured Outline of Man's Progress from the Earliest Days to the Present. New York: The Macmillian Company, 1931.
MLA (9th ed.) CitationHartman, Gertrude. The World We Live in and How It Came to Be: A Pictured Outline of Man's Progress from the Earliest Days to the Present. The Macmillian Company, 1931.
Warning: These citations may not always be 100% accurate.