APA (7th ed.) Citation

Sandler, M. W. (2009). Secret subway: The fascinating tale of an amazing feat of engineering. National Geographic.

Chicago Style (17th ed.) Citation

Sandler, Martin W. Secret Subway: The Fascinating Tale of an Amazing Feat of Engineering. Washington, D.C.: National Geographic, 2009.

MLA (9th ed.) Citation

Sandler, Martin W. Secret Subway: The Fascinating Tale of an Amazing Feat of Engineering. National Geographic, 2009.