Cita APA

Kelen, A. (2001). The gratis economy: Privately provided public goods (English ed.). CEU Press.

Citación estilo Chicago

Kelen, András. The Gratis Economy: Privately Provided Public Goods. English ed. Budapest: CEU Press, 2001.

Cita MLA

Kelen, András. The Gratis Economy: Privately Provided Public Goods. English ed. CEU Press, 2001.

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