Dyfyniad APA

(1997). United states: Adventures in time and place. New York: McGraw-Hill School Divisionn.

Dyfyniad Arddull Chicago

United States: Adventures in Time and Place. New York: McGraw-Hill School Divisionn, 1997.

Dyfyniad MLA

United States: Adventures in Time and Place. New York: McGraw-Hill School Divisionn, 1997.

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