Armstrong, J. (1959). The theory of play: A study of its history and philosophy based on original texts by Schiller, Froebel, Campayre, and Piaget. [publisher not identified].
Chicago Style (17th ed.) CitationArmstrong, Joanna. The Theory of Play: A Study of Its History and Philosophy Based on Original Texts by Schiller, Froebel, Campayre, and Piaget. [Place of publication not identified]: [publisher not identified], 1959.
MLA (9th ed.) CitationArmstrong, Joanna. The Theory of Play: A Study of Its History and Philosophy Based on Original Texts by Schiller, Froebel, Campayre, and Piaget. [publisher not identified], 1959.
Warning: These citations may not always be 100% accurate.