Frommer, H. (2017). Seattle: Seattle Downtown, Washington University, Olympic National Park, Seattle & region, Western Washington, North Cascades National Park, Mount Rainier National Park : updated, durable, water-repellent, write-on/wipe-off surface (11th edition.). Borch GmbH.
Chicago-Zitierstil (17. Ausg.)Frommer, H. Seattle: Seattle Downtown, Washington University, Olympic National Park, Seattle & Region, Western Washington, North Cascades National Park, Mount Rainier National Park : Updated, Durable, Water-repellent, Write-on/wipe-off Surface. 11th edition. [Hauzenberg]: Borch GmbH, 2017.
MLA-Zitierstil (9. Ausg.)Frommer, H. Seattle: Seattle Downtown, Washington University, Olympic National Park, Seattle & Region, Western Washington, North Cascades National Park, Mount Rainier National Park : Updated, Durable, Water-repellent, Write-on/wipe-off Surface. 11th edition. Borch GmbH, 2017.