Cita APA (7a ed.)
Wallace, R. A. (1984). Biosphere: The realm of life. Scott, Foresman and Company.
Cita Chicago Style (17a ed.)
Wallace, Robert A. Biosphere: The Realm of Life. United States of América: Scott, Foresman and Company, 1984.
Cita MLA (9a ed.)
Wallace, Robert A. Biosphere: The Realm of Life. Scott, Foresman and Company, 1984.
Precaución: Estas citas no son 100% exactas.