APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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