APA (7th ed.) Citation

Nicolson, I. (1981). Gravity, black holes, and the universe. David & Charles.

Chicago Style (17th ed.) Citation

Nicolson, Iain. Gravity, Black Holes, and the Universe. Newton Abbot: David & Charles, 1981.

MLA (9th ed.) Citation

Nicolson, Iain. Gravity, Black Holes, and the Universe. David & Charles, 1981.

Warning: These citations may not always be 100% accurate.