Franklin

MLA

Fröbel, Friedrich, and Irene M Lilley. Friedrich Froebel: a Selection From His Writings. Cambridge: Cambridge U.P., 1967.

APA

Fröbel, F., & Lilley, I. M. (1967). Friedrich Froebel: a selection from his writings. Cambridge: Cambridge U.P.

Chicago

Fröbel, Friedrich, and Irene M. Lilley. Friedrich Froebel: A Selection From His Writings. Cambridge: Cambridge U.P., 1967.