एपीए उद्धरण

Narlikar, J. V. (1985). From black clouds to black holes. Singapore ; Philadelphia: World Scientific.

शिकागो स्टाइल उद्धरण

Narlikar, Jayant Vishnu. From Black Clouds to Black Holes. Singapore ; Philadelphia: World Scientific, 1985.

एमएलए उद्धरण

Narlikar, Jayant Vishnu. From Black Clouds to Black Holes. Singapore ; Philadelphia: World Scientific, 1985.