Columbia River Bioregional Education Project. (1987). Columbiana. Columbia Pub..
Chicago Style (17th ed.) CitationColumbia River Bioregional Education Project. Columbiana. Oroville, WA: Columbia Pub., 1987.
MLA引文Columbia River Bioregional Education Project. Columbiana. Columbia Pub., 1987.
警告:這些引文格式不一定是100%准確.