Cita APA (7th ed.)

Byars, B. (1981). The 18th emergency. Puffin Books.

Cita Chicago (17th ed.)

Byars, Betsy. The 18th Emergency. New York: Puffin Books, 1981.

Cita MLA (9th ed.)

Byars, Betsy. The 18th Emergency. Puffin Books, 1981.