APA (7th ed.) Citation

Kelty, C. M. (2008). Two bits: The cultural significance of free software. Duke University Press.

Chicago Style (17th ed.) Citation

Kelty, Christopher M. Two Bits: The Cultural Significance of Free Software. Durham: Duke University Press, 2008.

MLA (9th ed.) Citation

Kelty, Christopher M. Two Bits: The Cultural Significance of Free Software. Duke University Press, 2008.