Clark, R. (1961). The universe: Plan or accident? Muhlenberg Press.
Citación estilo ChicagoClark, Robert. The Universe: Plan or Accident? Philadelphia: Muhlenberg Press, 1961.
Cita MLAClark, Robert. The Universe: Plan or Accident? Muhlenberg Press, 1961.
Warning: These citations may not always be 100% accurate.