Price, J. (1982). Thirty days to more powerful writing. Avenel Books.
Chicago Style (17th ed.) CitationPrice, Jonathan. Thirty Days to More Powerful Writing. New York: Avenel Books, 1982.
MLA (9th ed.) CitationPrice, Jonathan. Thirty Days to More Powerful Writing. Avenel Books, 1982.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.