Cita APA (7a ed.)

Weldon, J., & Levitt, Z. (1977). Is there life after death. Harvest House.

Cita Chicago Style (17a ed.)

Weldon, John, y Zola Levitt. Is There Life After Death. California: Harvest House, 1977.

Cita MLA (9a ed.)

Weldon, John, y Zola Levitt. Is There Life After Death. Harvest House, 1977.