MLA

Bartnik, Ryszard; Bartnik, Berenika; Hnydiuk-Stefan, Anna, Berenika Bartnik, and Anna Hnydiuk-Stefan. Optimum Investment Strategy In the Power Industry. Springer International Publishing, 2016.

APA

Bartnik, A., Bartnik, B., & Hnydiuk-Stefan, A. (2016). Optimum Investment Strategy in the Power Industry. Springer International Publishing.

Chicago

Bartnik, Ryszard; Bartnik, Berenika; Hnydiuk-Stefan, Anna, Berenika Bartnik, and Anna Hnydiuk-Stefan. Optimum Investment Strategy In the Power Industry. : Springer International Publishing, 2016.