Cita APA

Seuss, D. 1., & Seuss, D. 1. (1987). Happy birthday to you! New York: Random House.

Citación estilo Chicago

Seuss, Dr. 1904-1991,, y Dr. 1904-1991 Seuss. Happy Birthday to You! New York: Random House, 1987.

Cita MLA

Seuss, Dr. 1904-1991,, y Dr. 1904-1991 Seuss. Happy Birthday to You! New York: Random House, 1987.