APA (7th ed.) Citation

ScienceDirect (Online service), Hawes, R. H., Fockens, P., & Varadarajulu, S. (2019). Endosonography (Fourth edition.). Elsevier.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service), Robert H. Hawes, Paul Fockens, and Shyam Varadarajulu. Endosonography. Fourth edition. Philadelphia, PA: Elsevier, 2019.

MLA (9th ed.) Citation

ScienceDirect (Online service), et al. Endosonography. Fourth edition. Elsevier, 2019.