Cita APA (7a ed.)

Lundberg, S., & Smalley, N. (2021). A question mark is half a heart (First U.S. edition.). Houghton Mifflin Harcourt.

Cita Chicago Style (17a ed.)

Lundberg, Sofia, y Nichola Smalley. A Question Mark Is Half a Heart. First U.S. edition. Boston: Houghton Mifflin Harcourt, 2021.

Cita MLA (8a ed.)

Lundberg, Sofia, y Nichola Smalley. A Question Mark Is Half a Heart. First U.S. edition. Houghton Mifflin Harcourt, 2021.

Precaución: Estas citas no son 100% exactas.