For example, if you are citing my hypothetical paper with Masala Dose and Gobi Manchurian that appeared in 2045, i.e., [DKM45], then the bibtex entry would be:
@article{DKM45,
author = {Masala Dose and {Karthik {C. S.}} and Gobi Manchurian},
title = {On {Growing} up in {Bangalore}},
journal = {Nostalgia journal of {Life}},
volume = {54},
pages = {1--1000},
year = {2045}
}