Cita APA

Petroski, H. (1992). The pencil: A history of design and circumstance. New York: Alfred A. Knoff.

Chicago Style Citation

Petroski, Henry. The Pencil: A History of Design and Circumstance. New York: Alfred A. Knoff, 1992.

Cita MLA

Petroski, Henry. The Pencil: A History of Design and Circumstance. New York: Alfred A. Knoff, 1992.

Atenció: Aquestes cites poden no estar 100% correctes.