↑ Gale, Dorothy (1901). Following the Yellow Brick Road: Travel Guide to Oz. Emerald City, Oz: Emerald City Press. ISBN879-3456457790579496. {{cite book}}: Check |isbn= value: length (help); Unknown parameter |coauthors= ignored (|author= suggested) (help)
↑ Merciless, Ming (1936). How to Manage a Mob of Useless Morons. Mingo City, Mongo: Mongo Press. ISBN879-5730967920865537. {{cite book}}: Check |isbn= value: length (help); Unknown parameter |coauthors= ignored (|author= suggested) (help)
↑Spade, Samuel (1937-12-24). "Dames I Turned Over to the Flatfeet". in Philip Marlowe, ed.,. Proc. of SFPE CMICW 23. Conference on Maintaining Integrity in a Crummy World. San Francisco, California: Society of Fictional Private Eyes. pp. 56-62.
↑TheDog, Lassie (1967-9-23). "I'm as Intelligent as Any of My Owners". in Rin Tin Tin, ed.,. Proc. of SADW CAP 7. Conference on Animal Prejudice. Chicago, Illinois: Society Against Discrimination in the Workplace. pp. 3-9.
