APA (7th ed.) Citation

Nicolson, I., & Moore, P. (1974). Black holes in space. Ocean Books.

Chicago Style (17th ed.) Citation

Nicolson, Iain, and Patrick Moore. Black Holes in Space. London: Ocean Books, 1974.

MLA (9th ed.) Citation

Nicolson, Iain, and Patrick Moore. Black Holes in Space. Ocean Books, 1974.

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