Dyfyniad APA

Ritchie, D. A. (1997). American history: The early years to 1877. New York: Glencoe/McGraw-Hill.

Dyfyniad Arddull Chicago

Ritchie, Donald A. American History: The Early Years to 1877. New York: Glencoe/McGraw-Hill, 1997.

Dyfyniad MLA

Ritchie, Donald A. American History: The Early Years to 1877. New York: Glencoe/McGraw-Hill, 1997.

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