Gaya APA

Pignolo, R, J., Ahn, J. (2018). Fractures in the Elderly (2nd ed. 2018). New york: Springer International Publishing.

Gaya MLA

Pignolo, Robert, J.., Ahn, Jaimo. "Fractures in the Elderly". 2nd ed. 2018 New york: Springer International Publishing, 2018. Text.