Levando anclas [vídeo], 1995---cinta (Directors of photography, Robert Planck, Charles Boyle)
Internet movie database, 22-04-2004---(Charles P. Boyle; b. 1892, Illinois (USA), d. 1968, Los Angeles, California (USA); sometimes credited as Charles Boyle; cinematographer)
Film index international [CD-ROM], British Film Institute, 1995---
