The Wizard of Oz
The Wizard of Oz, or The Wonderful Wizard of Oz as its full name, was the common name of a children's book published on Earth in 1900. It is also the title of a 1939 movie adaptation of the book.

In 2151, Commander  compared the capital city of Coridan to the Emerald City, a location from the book. ()

Armus called Data "Tin Man" during their encounter on Vagra II. () 

"If I Only Had a Heart", a tune that Doctor Ira Graves used to whistle, was a song from the 1939 movie adaptation of the book, sung by the Tin Man. Graves also compared Data's desire to become more Human to the mechnical man's quest of being Human. () 

Starfleet scientists dubbed also Gomtuu "Tin Man", after the very same character. () 

When Doctor Beverly Crusher was caught in a shrinking warp bubble and began to realize how easy it would be to leave the bubble, she said "Click my heels together three times and I'm back in Kansas?", referencing a phrase from The Wizard of Oz, spoken by the main character, Dorothy. ()

The Clown also quoted The Wizard of Oz from Harry Kim's memory, stating "There is no place like home" and mocked the Ensign because he was restrained and thus not able to "click his heels together three times." ()

In 2373, Jake Sisko and Nog said "Lions, Gigers, bears…", "Oh my", paraphrasing the line "Lions and tigers and bears, oh my" from the film version of The Wizard of Oz. ()

Appendices

Background information 
Billy Curtis, who had a non-speaking role as one of the "small copper-skinned ambassadors" in , played a small part as one of the Munchkins in The Wizard of Oz.

Jean-Luc Picard's line to Lily Sloane in  about not being in Montana any more is an obvious reference to a line in the 1939 MGM-produced movie version of The Wizard of Oz about not being in Kansas anymore. 

The Wizard of Oz is one of the few real-life movies referenced in Star Trek not produced by Paramount Pictures.

External links
 
 
 The Wonderful Wizard of Oz book at Oz wiki
 The Wizard of Oz film at Oz wiki

fr:Le magicien d'Oz
Wizard of Oz
Wizard of Oz