The APA does not require a Reference citation if your are citing an entire website. You just include the web address in the text of your paper. However, some instructors may still want you to cite an entire web page on your References page.
Wild Mushrooms of the Pacific Northwest. (2009). Retrieved from http://www.wildmushroomspnw.org
Hackensack, J. (2009). Oregon Mushroom Hunting. Retrieved from http://www.oregonmushrooms.org
Wild Mushrooms of the Pacific Northwest (2009). The Blue Spotted Mushroom. Retrieved from http://www.wildmushroomspnw_blue_spotted.org
Hackensack, J. (2009). Oregon Mushroom Hunting. Obtaining A Wild Mushroom Commercial License. Retrieved from http://www.oregonmushrooms_license.org