El presidio. In: kinoundco.de (abgerufen am 29. Oktober 2023).
nytimes.com
Mordaunt Hall: The Big House (1930). Movie Review. The New York Times, 25. Juni 1930, abgerufen am 22. Juli 2014: „It is a film in which the direction, the photography, the microphone work and the magnificent acting take precedence over the negligible story. […] Mr. Hill has worked marvels with his sound effects. He has striven for realism […] The rat-tat-tat of machine guns, the sudden entry of a couple of tanks add to the stirring quality of the closing scenes.“
