BibTex format
@article{Sam:2016:10.1186/s12909-016-0793-z,
author = {Sam, AH and Hameed, S and Harris, J and Meeran, K},
doi = {10.1186/s12909-016-0793-z},
journal = {BMC Medical Education},
title = {Validity of very short answer versus single best answer questions for undergraduate assessment},
url = {http://dx.doi.org/10.1186/s12909-016-0793-z},
volume = {16},
year = {2016}
}