[Field Enterprises Educational Corporation]. (1976). The World book encyclopedia. Field Enterprises Educational Corp..
Dyfyniad Arddull Chicago[Field Enterprises Educational Corporation]. The World Book Encyclopedia. Chicago: Field Enterprises Educational Corp., 1976.
Dyfyniad MLA[Field Enterprises Educational Corporation]. The World Book Encyclopedia. Field Enterprises Educational Corp., 1976.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.