APA ציטוט
ebrary, Inc. (1993). Protecting visibility in national parks and wilderness areas. National Academy Press.
Chicago Style (17th ed.) Citation
ebrary, Inc. Protecting Visibility in National Parks and Wilderness Areas. Washington, D.C.: National Academy Press, 1993.
ציטוט MLA
ebrary, Inc. Protecting Visibility in National Parks and Wilderness Areas. National Academy Press, 1993.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.