APA (7th ed.) Citation

O'Neill, G. K. (1982). The high frontier: Human colonies in space. Anchor Books.

Chicago Style (17th ed.) Citation

O'Neill, Gerard K. The High Frontier: Human Colonies in Space. Garden City, N.Y.: Anchor Books, 1982.

MLA (9th ed.) Citation

O'Neill, Gerard K. The High Frontier: Human Colonies in Space. Anchor Books, 1982.