Cita APA (7th ed.)

Graham, C., & Chapman, J. (1985). Hopscotch: Activity book. Level two. Regents Publishing Company.

Cita Chicago (17th ed.)

Graham, Carolyn, i John Chapman. Hopscotch: Activity Book. Level Two. Nueva York: Regents Publishing Company, 1985.

Cita MLA (9th ed.)

Graham, Carolyn, i John Chapman. Hopscotch: Activity Book. Level Two. Regents Publishing Company, 1985.