Dyfyniad APA
Petrucci, R. H. (1985). General chemistry: Principles and modern applications (4th ed.). Macmillan.
Dyfyniad Arddull Chicago
Petrucci, Ralph H. General Chemistry: Principles and Modern Applications. 4th ed. New York: Macmillan, 1985.
Dyfyniad MLA
Petrucci, Ralph H. General Chemistry: Principles and Modern Applications. 4th ed. Macmillan, 1985.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.