Dyfyniad APA

Sally, J. D., & Sally, P. J. (2007). Roots to research: A vertical development of mathematical problems. American Mathematical Society.

Dyfyniad Arddull Chicago

Sally, Judith D., and Paul J. Sally. Roots to Research: A Vertical Development of Mathematical Problems. Providence, R.I.: American Mathematical Society, 2007.

Dyfyniad MLA

Sally, Judith D., and Paul J. Sally. Roots to Research: A Vertical Development of Mathematical Problems. American Mathematical Society, 2007.

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