Cita APA (7a ed.)

Udry, J. M., & Simont, M. (1984). A tree is nice. HarperCollins Publishers.

Cita Chicago Style (17a ed.)

Udry, Janice May, y Marc Simont. A Tree Is Nice. New York: HarperCollins Publishers, 1984.

Cita MLA (8a ed.)

Udry, Janice May, y Marc Simont. A Tree Is Nice. HarperCollins Publishers, 1984.

Precaución: Estas citas no son 100% exactas.