Gaya APA

Vigna, P., Casey, M, J. (2016). The age of cryptocurrency : how bitcoin and the blockchain are challenging the global economic order . New York: Picador St. Martin\'s Press.

Gaya MLA

Vigna, Paul., Casey, Michael, J.. "The age of cryptocurrency : how bitcoin and the blockchain are challenging the global economic order". New York: Picador St. Martin\'s Press, 2016. Text.