Barnes, J. J. (1964). Free trade in books: A study of the London book trade since 1800. Clarendon Press.
Citazione stile Chigago Style (17a edizione)Barnes, James J. Free Trade in Books: A Study of the London Book Trade Since 1800. Oxford: Clarendon Press, 1964.
Citatione MLA (8a ed.)Barnes, James J. Free Trade in Books: A Study of the London Book Trade Since 1800. Clarendon Press, 1964.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.