APA (7th ed.) Citation

Sommer, A. H. (1951). Photoelectric tubes (2. ed., rev. and reset.). Methuen.

Chicago Style (17th ed.) Citation

Sommer, Alfred Hermann. Photoelectric Tubes. 2. ed., rev. and reset. London: Methuen, 1951.

MLA (9th ed.) Citation

Sommer, Alfred Hermann. Photoelectric Tubes. 2. ed., rev. and reset. Methuen, 1951.