APA

Pierce M., Stapleton D. L., . (2003). The 21st century principal: current issues in leadership and policy. Cambridge, MA: Harvard Education Press.

Chicago

Pierce Milli, Stapleton Deborah L, . 2003. The 21st century principal: current issues in leadership and policy. Cambridge, MA: Harvard Education Press.

Harvard

Pierce M., Stapleton D. L., . (2003). The 21st century principal: current issues in leadership and policy. Cambridge, MA: Harvard Education Press.

MLA

Pierce Milli, Stapleton Deborah L, . The 21st century principal: current issues in leadership and policy. Cambridge, MA: Harvard Education Press. 2003.