Cita APA (7a ed.)

Gottesfeld, J., & Tavares, M. (2021). Twenty-one steps: Guarding the Tomb of the Unknown Soldier (First edition.). Candlewick Press.

Cita Chicago Style (17a ed.)

Gottesfeld, Jeff, y Matt Tavares. Twenty-one Steps: Guarding the Tomb of the Unknown Soldier. First edition. Somerville, Massachusetts: Candlewick Press, 2021.

Cita MLA (8a ed.)

Gottesfeld, Jeff, y Matt Tavares. Twenty-one Steps: Guarding the Tomb of the Unknown Soldier. First edition. Candlewick Press, 2021.

Precaución: Estas citas no son 100% exactas.