Cita APA (7th ed.)

Smith, G. h. (2001). Celsum's challenge: A skeptic's guide... White stone.

Cita Chicago (17th ed.)

Smith, Gerald h. Celsum's Challenge: A Skeptic's Guide... anchorage: White stone, 2001.

Cita MLA (9th ed.)

Smith, Gerald h. Celsum's Challenge: A Skeptic's Guide... White stone, 2001.

Atenció: Aquestes cites poden no estar 100% correctes.