MLA

Koh, Ik Soo Koh; Won Lee, and Won Lee. Filler Complications. Springer Singapore, 2019.

APA

Koh, K., Ik Soo Koh; Won Lee, I. Soo Koh; Won Lee, & Lee, W. (2019). Filler Complications. Springer Singapore.

Chicago

Koh, Ik Soo Koh; Won Lee, and Won Lee. Filler Complications. : Springer Singapore, 2019.