HARFORD, Tim. 50 inventions that shaped the modern economy. New York : Riverhead Books, 2017. 321 s. ISBN 978-0-7352-1613-6. [Copy count : 2, currently available 0, at library only 2]
PINK, Daniel H. Drive : the surprising truth about what motivates us. New York : Riverhead Books, 2012. 270 s. ISBN 978-1-59448-480-3. [Copy count : 1, currently available 0, at library only 1]
