APA

Narlikar (Jayant V), . (1999). Seven Wonder Of The Cosmos. : .

Chicago

Narlikar (Jayant V), . 1999. Seven Wonder Of The Cosmos. : .

Harvard

Narlikar (Jayant V), . (1999). Seven Wonder Of The Cosmos. : .

MLA

Narlikar (Jayant V), . Seven Wonder Of The Cosmos. : . 1999.