APA
Simmons H. H., Avery A. H., . (19). Electrical Engineering. London: Cassell & Co.
Chicago
Simmons Harold H, Avery Alfred H, . 19. Electrical Engineering. London: Cassell & Co.
Harvard
Simmons H. H., Avery A. H., . (19). Electrical Engineering. London: Cassell & Co.
MLA
Simmons Harold H, Avery Alfred H, . Electrical Engineering. London: Cassell & Co. 19.