Starkey, C. M., & Penn, N. W. (1995). What you need to know about reading signs, directories, schedules, maps, charts & graphs. National Textbook Co.
Chicago Style (17. basım) AtıfStarkey, Carolyn Morton, ve Norgina Wright Penn. What You Need to Know About Reading Signs, Directories, Schedules, Maps, Charts & Graphs. Lincolnwood, Ill: National Textbook Co, 1995.
MLA (9th ed.) AtıfStarkey, Carolyn Morton, ve Norgina Wright Penn. What You Need to Know About Reading Signs, Directories, Schedules, Maps, Charts & Graphs. National Textbook Co, 1995.
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