Dyfyniad APA

Spring Joel. (2004). The American School 1642 - 2004. American: McGraw -Hill.

Dyfyniad Arddull Chicago

Spring Joel. The American School 1642 - 2004. American: McGraw -Hill, 2004.

Dyfyniad MLA

Spring Joel. The American School 1642 - 2004. American: McGraw -Hill, 2004.

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