Dyfyniad APA

Piaget, J. (1970). Main trends in inter-disciplinary research. Harper & Row.

Dyfyniad Arddull Chicago

Piaget, Jean. Main Trends in Inter-disciplinary Research. New York: Harper & Row, 1970.

Dyfyniad MLA

Piaget, Jean. Main Trends in Inter-disciplinary Research. Harper & Row, 1970.

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