Dyfyniad APA

Schwartz, S. I. (1984). Principles of surgery (4th ed.). JMC Press.

Dyfyniad Arddull Chicago

Schwartz, Seymour I. Principles of Surgery. 4th ed. Quezon City: JMC Press, 1984.

Dyfyniad MLA

Schwartz, Seymour I. Principles of Surgery. 4th ed. JMC Press, 1984.

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