Lua APA (7ú heag.)

STALLCUP, J. G. (1989). Illustrated changes: Of the 1990 NEC. American Technical Pub.

Lua i Stíl Chicago (17ú heag.)

STALLCUP, James G. Illustrated Changes: Of the 1990 NEC. Homewood: American Technical Pub, 1989.

Lua MLA (9ú heag.)

STALLCUP, James G. Illustrated Changes: Of the 1990 NEC. American Technical Pub, 1989.

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