APA (7th ed.) Citation

Pickel, W., Kus, J., Flores, D., Kalaitzidis, S., Christanis, K., Cardott, B., . . . Wagner, N. (2017). Classification of liptinite – ICCP System 1994. International Journal of Coal Geology, 169, 40. https://doi.org/10.1016/j.coal.2016.11.004

Chicago Style (17th ed.) Citation

Pickel, W., et al. "Classification of Liptinite – ICCP System 1994." International Journal of Coal Geology 169 (2017): 40. https://doi.org/10.1016/j.coal.2016.11.004.

MLA (9th ed.) Citation

Pickel, W., et al. "Classification of Liptinite – ICCP System 1994." International Journal of Coal Geology, vol. 169, 2017, p. 40, https://doi.org/10.1016/j.coal.2016.11.004.