These are some abbreviations you might find useful when referencing, particularly if some of the details you need for a reference are missing.
| Anon. | Anonymous |
| dir. | Director |
| ed(s). | editor or edition |
| et al. | and others (for multiple authors) |
| wr. | writer |
| prod. | producer |
| p. | page |
| pp. | pages |
| op. cit. | in the work already quoted |
| ibid. | in the same book or article etc as just quoted |
| n.d. | date unknown |
| s.l. | Place of publication unknown |
| s.n. | Publisher unknown |