Ratcliff, J. (1993). Timecode: A user's guide. Focal Press.
Lua i Stíl Chicago (17ú heag.)Ratcliff, John. Timecode: A User's Guide. Oxford: Focal Press, 1993.
Lua MLA (9ú heag.)Ratcliff, John. Timecode: A User's Guide. Focal Press, 1993.
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