Smith 1999. Op. cit is contrasted with ibid., an abbreviation of the Latin adverb ibidem, meaning in the same place; in that very place which refers the reader to the title of the work in the preceding footnote. The easily confused idem (sometimes abbreviated id.
Just to be safe I would have to say leave it in a room temperature area; away from any windows or heaters that can affect the temperature of the egg; for about 6 or 7 hours at the least.
To warm eggs up to room temperature for certain recipes, either remove the eggs from the refrigerator at least 30 minutes before needed or place the eggs in a bowl of very warm water for several minutes. Separated eggs can also be kept in the refrigerator but the egg white and the yolk must be kept separate.