APA-viite (7. p.)

Pietilä, I. (2011). The game of innovating a game: Homo Ludens as an entrepreneur.

Chicago-viite (17. p.)

Pietilä, Irmeli. The Game of Innovating a Game: Homo Ludens as an Entrepreneur. Jyväskylä, 2011.

MLA-viite (9. p.)

Pietilä, Irmeli. The Game of Innovating a Game: Homo Ludens as an Entrepreneur. 2011.