Dyfyniad APA

York, U. o. t. S. o. N. (1969). General science handbook; part 3. Bureau of Secondary Curriculum Development.

Dyfyniad Arddull Chicago

York, University of the State of New. General Science Handbook; Part 3. New York: Bureau of Secondary Curriculum Development, 1969.

Dyfyniad MLA

York, University of the State of New. General Science Handbook; Part 3. Bureau of Secondary Curriculum Development, 1969.

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