APA (7th ed.) Citation

Martin, L. Y. (1974). Contributions of play research to human development (Mikrofilm-Ausgabe.). University Microfilms.

Chicago Style (17th ed.) Citation

Martin, Lee York. Contributions of Play Research to Human Development. Mikrofilm-Ausgabe. Ann Arbor, Mich: University Microfilms, 1974.

MLA (9th ed.) Citation

Martin, Lee York. Contributions of Play Research to Human Development. Mikrofilm-Ausgabe. University Microfilms, 1974.

Warning: These citations may not always be 100% accurate.