Gaya APA

Robinson, K. (2010). The Element How Finding Your Passion Changes Everything 'Happiness really is within your grasp' Guardian . USA Amerika Serikat: Penguin Books.

Gaya MLA

Robinson, Ken. "The Element How Finding Your Passion Changes Everything 'Happiness really is within your grasp' Guardian". USA Amerika Serikat: Penguin Books, 2010. Text.