APA

Van Loon H. W., . (19681967). The story of mankind. New York: Washington Square Press.

Chicago

Van Loon Hendrik Willem, . 19681967. The story of mankind. New York: Washington Square Press.

Harvard

Van Loon H. W., . (19681967). The story of mankind. New York: Washington Square Press.

MLA

Van Loon Hendrik Willem, . The story of mankind. New York: Washington Square Press. 19681967.