Dyfyniad APA

Schwartz, S. I., & Lillehei, R. C. (1974). Principles of surgery. McGraw-Hill.

Dyfyniad Arddull Chicago

Schwartz, Seymour I., and Richard C. Lillehei. Principles of Surgery. New York: McGraw-Hill, 1974.

Dyfyniad MLA

Schwartz, Seymour I., and Richard C. Lillehei. Principles of Surgery. McGraw-Hill, 1974.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.