Cita APA (7a ed.)

Carlstrom, N. W., & Saport, L. (2002). Before you were born. Eerdmans Books for Young Readers.

Cita Chicago Style (17a ed.)

Carlstrom, Nancy White, y Linda Saport. Before You Were Born. Grand Rapids, MI: Eerdmans Books for Young Readers, 2002.

Cita MLA (8a ed.)

Carlstrom, Nancy White, y Linda Saport. Before You Were Born. Eerdmans Books for Young Readers, 2002.