Ryan, J. P. (1991). Design of warning labels and instructions / Joseph P. Ryan. Van Nostrand Reinhold.
Chicago Style (17th ed.) CitationRyan, Joseph P. Design of Warning Labels and Instructions / Joseph P. Ryan. New York: Van Nostrand Reinhold, 1991.
MLA (9th ed.) CitationRyan, Joseph P. Design of Warning Labels and Instructions / Joseph P. Ryan. Van Nostrand Reinhold, 1991.
Warning: These citations may not always be 100% accurate.