APA (7e ed.) Bronvermelding

Pfiffner, G. (1994). Earth friendly toys: How to make fabulous toys and game and games from rensable objects. John Wiley.

Chicago (17e ed.) Bronvermelding

Pfiffner, George. Earth Friendly Toys: How to Make Fabulous Toys and Game and Games from Rensable Objects. New York: John Wiley, 1994.

MLA (8e ed.) Bronvermelding

Pfiffner, George. Earth Friendly Toys: How to Make Fabulous Toys and Game and Games from Rensable Objects. John Wiley, 1994.