Cita APA (7a ed.)
Sheen, F. J. Life is Worth Living: Second Series. McGraw-Hill.
Cita estilo Chicago (17a ed.)
Sheen, Fulton J. Life Is Worth Living: Second Series. Nueva York, EUA: McGraw-Hill.
Cita MLA (9a ed.)
Sheen, Fulton J. Life Is Worth Living: Second Series. McGraw-Hill.
Precaución: Estas citas no son 100% exactas.