Cita APA (7th ed.)

Starkey, C. M., & Penn, N. W. (1995). What you need to know about reading signs, directories, schedules, maps, charts & graphs. National Textbook Co.

Cita Chicago (17th ed.)

Starkey, Carolyn Morton, i Norgina Wright Penn. What You Need to Know About Reading Signs, Directories, Schedules, Maps, Charts & Graphs. Lincolnwood, Ill: National Textbook Co, 1995.

Cita MLA (9th ed.)

Starkey, Carolyn Morton, i Norgina Wright Penn. What You Need to Know About Reading Signs, Directories, Schedules, Maps, Charts & Graphs. National Textbook Co, 1995.