Clark, R. E. D. (1972). The universe: Plan or accident? Zondervan.
Cita Chicago (17th ed.)Clark, Robert E. D. The Universe: Plan or Accident? Zondervan, 1972.
Cita MLA (9th ed.)Clark, Robert E. D. The Universe: Plan or Accident? Zondervan, 1972.
Atenció: Aquestes cites poden no estar 100% correctes.