Gaya APA

POSITANO, R, G. et al (2017). SYSTEMIC disease manifestations in the foot, ankle, and lower extremity . Philadelphia: Wolters Kluwer.

Gaya MLA

POSITANO, Rock, G.. et al. "SYSTEMIC disease manifestations in the foot, ankle, and lower extremity". Philadelphia: Wolters Kluwer, 2017. Text.