APA (7th ed.) Citation

Hamele, H. "The book of environmental seals & ecolabels" . environmental awards in tourism ; an international overview of current developments.

Chicago Style (17th ed.) Citation

Hamele, Herbert. "The Book of Environmental Seals & Ecolabels" . Environmental Awards in Tourism ; an International Overview of Current Developments.

MLA (8th ed.) Citation

Hamele, Herbert. "The Book of Environmental Seals & Ecolabels" . Environmental Awards in Tourism ; an International Overview of Current Developments.

Warning: These citations may not always be 100% accurate.