Dyfyniad APA

Hill, J. W., & Marshall, P. (2001). Chemical investigations for changing times (9th ed.). Prentice Hall.

Dyfyniad Arddull Chicago

Hill, John William, and Paula Marshall. Chemical Investigations for Changing Times. 9th ed. New Jersey: Prentice Hall, 2001.

Dyfyniad MLA

Hill, John William, and Paula Marshall. Chemical Investigations for Changing Times. 9th ed. Prentice Hall, 2001.

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