APA

McKillip P. A., . (1979). Riddle of stars. New York: Doubleday.

Chicago

McKillip Patricia A, . 1979. Riddle of stars. New York: Doubleday.

Harvard

McKillip P. A., . (1979). Riddle of stars. New York: Doubleday.

MLA

McKillip Patricia A, . Riddle of stars. New York: Doubleday. 1979.