Tupera Tupera (Firm). (2015). Polar bear's underwear. Chronicle Books.
Cita Chicago Style (17a ed.)Tupera Tupera (Firm). Polar Bear's Underwear. San Francisco: Chronicle Books, 2015.
Cita MLA (8a ed.)Tupera Tupera (Firm). Polar Bear's Underwear. Chronicle Books, 2015.
Precaución: Estas citas no son 100% exactas.