Cita APA (7a ed.)

Clark, R. (1961). The universe: Plan or accident? Muhlenberg Press.

Cita Chicago Style (17a ed.)

Clark, Robert. The Universe: Plan or Accident? Philadelphia: Muhlenberg Press, 1961.

Cita MLA (9a ed.)

Clark, Robert. The Universe: Plan or Accident? Muhlenberg Press, 1961.