Cita APA (7th ed.)

(1997). The Earth's eyes: Big lakes - great opportunities. Published by the World Wide Fund for Nature and Pro Futura.

Cita Chicago (17th ed.)

The Earth's Eyes: Big Lakes - Great Opportunities. Munich: Published by the World Wide Fund for Nature and Pro Futura, 1997.

Cita MLA (9th ed.)

The Earth's Eyes: Big Lakes - Great Opportunities. Published by the World Wide Fund for Nature and Pro Futura, 1997.