Gaya APA

ELECTRICAL, N. (1989). BLUEPRINT READING 11th EDITION BASED ON THE 1990 NATIONAL ELECTRICAL CODE . United States of America: American Technical Publisher.

Gaya MLA

ELECTRICAL, NATIONAL. "BLUEPRINT READING 11th EDITION BASED ON THE 1990 NATIONAL ELECTRICAL CODE". United States of America: American Technical Publisher, 1989. Text.