Tohutoro APA (7th ed.)

Narlikar, J. V. [. (1999). Seven wonders of the cosmos. Univ. Pr..

Tohutoru Kātū Chicago (17th ed.)

Narlikar, Jayant V. [Vishnu]. Seven Wonders of the Cosmos. Cambridge: Univ. Pr., 1999.

Tohutoro MLA (9th ed.)

Narlikar, Jayant V. [Vishnu]. Seven Wonders of the Cosmos. Univ. Pr., 1999.