Walling, D. R. (1995). At the threshold of the millenium. Phi Delta Kappa Educational Foundation.
Style de citation Chicago (17e éd.)Walling, Donovan R. At the Threshold of the Millenium. Indiana: Phi Delta Kappa Educational Foundation, 1995.
Style de citation MLA (9e éd.)Walling, Donovan R. At the Threshold of the Millenium. Phi Delta Kappa Educational Foundation, 1995.
Attention : ces citations peuvent ne pas être correctes à 100%.