Cita APA (7a ed.)

Singer, J. L., Biblow, E., Gottlieb, S., Freyberg, J. T., & Pulaski, M. A. (1973). The Child's world of make-believe: Experimental studies of imaginative play. Acad.Pr.

Cita Chicago Style (17a ed.)

Singer, Jerome L., Ephraim Biblow, Sybil Gottlieb, Joan T. Freyberg, y Mary A. Pulaski. The Child's World of Make-believe: Experimental Studies of Imaginative Play. New York [u.a.]: Acad.Pr, 1973.

Cita MLA (8a ed.)

Singer, Jerome L., et al. The Child's World of Make-believe: Experimental Studies of Imaginative Play. Acad.Pr, 1973.