Paper  doi  bibtex   

@article{nacke_maturing_2017,
	title = {The maturing of gamification research},
	volume = {71},
	issn = {07475632},
	url = {https://linkinghub.elsevier.com/retrieve/pii/S0747563216308111},
	doi = {10.1016/j.chb.2016.11.062},
	language = {en},
	urldate = {2020-10-19},
	journal = {Computers in Human Behavior},
	author = {Nacke, Lennart E. and Deterding, Sebastian},
	month = jun,
	year = {2017},
	pages = {450--454}
}