APA

WAZA magazine. Suiza: World Association of Zoos and Aquariums, WAZA.

Chicago

WAZA magazine. Suiza: World Association of Zoos and Aquariums, WAZA.

Harvard

WAZA magazine. Suiza: World Association of Zoos and Aquariums, WAZA.

MLA

Suiza: World Association of Zoos and Aquariums, WAZA. .