Cita APA (7th ed.)
Hill, E. (1966). The language of drawing. Prentice-Hall.
Cita Chicago (17th ed.)
Hill, Edward. The Language of Drawing. Englewood Cliffs, N.J.: Prentice-Hall, 1966.
Cita MLA (9th ed.)
Hill, Edward. The Language of Drawing. Prentice-Hall, 1966.
Atenció: Aquestes cites poden no estar 100% correctes.