Leipziger, D. M. (1981). Basic needs and development. Oelgeschlager, Gunn & Hain.
Citazione stile Chigago Style (17a edizione)Leipziger, Danny M. Basic Needs and Development. Cambridge, Mass: Oelgeschlager, Gunn & Hain, 1981.
Citatione MLA (9a ed.)Leipziger, Danny M. Basic Needs and Development. Oelgeschlager, Gunn & Hain, 1981.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.