Cita APA (7th ed.)

Narlikar, J. V. (1999). Seven wonders of the cosmos. Cambridge University Press.

Cita Chicago (17th ed.)

Narlikar, Jayant Vishnu. Seven Wonders of the Cosmos. Cambridge: Cambridge University Press, 1999.

Cita MLA (9th ed.)

Narlikar, Jayant Vishnu. Seven Wonders of the Cosmos. Cambridge University Press, 1999.