Cita APA (7a ed.)
Freed, P. E. (1979). Towers to eternity. Sceptre Books.
Cita Chicago Style (17a ed.)
Freed, Paul E. Towers to Eternity. Nashville: Sceptre Books, 1979.
Cita MLA (9a ed.)
Freed, Paul E. Towers to Eternity. Sceptre Books, 1979.
Precaución: Estas citas no son 100% exactas.