@book{73909,
	author = {Espinas , A and Spencer, Herbert },
	title = {Principes Psychologie.},
	publisher = {Félix Alcan, Éditeur, },
	year = {1959 .},
	address = {Paris :},
	edition = {Nouvelle Édition},
	url = {https://fll.law.cu.edu.eg/fulltext/bks/B10-11683.pdf}
}