Cita APA (7a ed.)

Isbell, R. T., & Exelby, B. (2001). Early learning environments that work. Gryphon House.

Cita Chicago Style (17a ed.)

Isbell, Rebecca T., y Betty Exelby. Early Learning Environments That Work. Beltsville, Md: Gryphon House, 2001.

Cita MLA (9a ed.)

Isbell, Rebecca T., y Betty Exelby. Early Learning Environments That Work. Gryphon House, 2001.