Gaya APA

Koch, R. (2013). Living the 80/20 way: work less, worry less, succeed more, enjoy more (Ed.1; Cet.1). London: Nicholas Brealey.

Gaya MLA

Koch, Richard. "Living the 80/20 way: work less, worry less, succeed more, enjoy more". Ed.1; Cet.1 London: Nicholas Brealey, 2013. Text.