Gregorio, D. d. (1968). The definition of categories of films.
Chicago-Zitierstil (17. Ausg.)Gregorio, Domenico de. The Definition of Categories of Films. Straßburg, 1968.
MLA-Zitierstil (8. Ausg.)Gregorio, Domenico de. The Definition of Categories of Films. 1968.
警告：这些引文格式不一定是100％准确.