Cita APA (7th ed.)

Spence, W. P. (1984). Engineering graphics. Prentice-Hall.

Cita Chicago (17th ed.)

Spence, William P. Engineering Graphics. Englewood Cliffs: Prentice-Hall, 1984.

Cita MLA (9th ed.)

Spence, William P. Engineering Graphics. Prentice-Hall, 1984.