Gaya APA

Popper, N. (2015). Digital gold : bitcoin and the inside story of the misfits and millionaires trying to reinvent money (1). New York: Harper Collins Publisher.

Gaya MLA

Popper, Nathaniel. "Digital gold : bitcoin and the inside story of the misfits and millionaires trying to reinvent money". 1 New York: Harper Collins Publisher, 2015. Text.