Παραπομπή APA

Higgins, R. A. (1974). Engineeering metallurgy. ELBS.

Παραπομπή Chicago Style

Higgins, Raymond A. Engineeering Metallurgy. London: ELBS, 1974.

Παραπομπή MLA

Higgins, Raymond A. Engineeering Metallurgy. ELBS, 1974.