Dyfyniad APA

Palmer, B. W. (1988). Guide and index to the papers of Charles Sumner. Chadwyck-Healey.

Dyfyniad Arddull Chicago

Palmer, Beverly Wilson. Guide and Index to the Papers of Charles Sumner. Alexandria, VA: Chadwyck-Healey, 1988.

Dyfyniad MLA

Palmer, Beverly Wilson. Guide and Index to the Papers of Charles Sumner. Chadwyck-Healey, 1988.

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