APA

Wright H., . (1950). Sweeper in the sky: the life of Maria Mitchell, first woman astronomer in America. New York: Macmillan Co.

Chicago

Wright Helen, . 1950. Sweeper in the sky: the life of Maria Mitchell, first woman astronomer in America. New York: Macmillan Co.

Harvard

Wright H., . (1950). Sweeper in the sky: the life of Maria Mitchell, first woman astronomer in America. New York: Macmillan Co.

MLA

Wright Helen, . Sweeper in the sky: the life of Maria Mitchell, first woman astronomer in America. New York: Macmillan Co. 1950.