APA (7th ed.) Citation

Winn, M., & Porcher, M. A. (1968). The playgroup book. Souvenir Press.

Chicago Style (17th ed.) Citation

Winn, Marie, and Mary Ann Porcher. The Playgroup Book. London: Souvenir Press, 1968.

MLA (8th ed.) Citation

Winn, Marie, and Mary Ann Porcher. The Playgroup Book. Souvenir Press, 1968.