Cita APA (7a ed.)
Flower, P. (1990). Understanding the universe. West Publishing Company.
Cita Chicago Style (17a ed.)
Flower, Phillip. Understanding the Universe. New York: West Publishing Company, 1990.
Cita MLA (9a ed.)
Flower, Phillip. Understanding the Universe. West Publishing Company, 1990.
Precaución: Estas citas no son 100% exactas.