Citazione APA

Sally, J. D., & Sally, P. (2012). Roots to research: A vertical development of mathematical problems. American Mathematical Society.

Stile di citazione Chicago

Sally, Judith D., e Paul Sally. Roots to Research: A Vertical Development of Mathematical Problems. Providence, R.I.: American Mathematical Society, 2012.

Citazione MLA

Sally, Judith D., e Paul Sally. Roots to Research: A Vertical Development of Mathematical Problems. American Mathematical Society, 2012.