APA (7th ed.) Citation

Gaarder Jostein. (1997). Hello? is anybody there? Chivers Press.

Chicago Style (17th ed.) Citation

Gaarder Jostein. Hello? Is Anybody There? London: Chivers Press, 1997.

MLA (9th ed.) Citation

Gaarder Jostein. Hello? Is Anybody There? Chivers Press, 1997.

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