Booher, Dianna. On the Importance of Using Concrete Words. Sourced from http://www.youtube.com/watch?v=vs9OF1LAcMQ&feature=related

Icathing. Abstract Objects. Sourced from http://www.flickr.com/photos/icathing/12261009/

Unizor Education. Math for Teenagers - Abstraction. Sourced from http://video.google.com/videoplay?docid=8278497527041862977#

Beckett, Samuel. The Unnamable (extract), 1953. sourced from http://www.youtube.com/watch?v=sFDI_NGjaLY

James, William. Lecture III: The Reality of the Unseen, The Varieties of Religious Experience: A Study in Human Nature (1902), Arc Manor LLC, 2008, p.46

Žižek, Slavoj. The Sublime Object of Ideology, Verso, 1989. Sourced from http://books.google.co.uk/booksid=EujcNVAlcw4C&pg=PA163&dq=macguffin&hl=en&ei=V_ZrTdbHH8aWhQeJhYjtDg&sa=X&oi=book_result&ct=result&resnum=2&ved=0CC0Q6AEwATgK#v=onepage&q=macguffin&f=false

Hitchcock, Alfred. 'Content versus Technique', A Talk With Hitchcock. Sourced from http://www.youtube.com/watch?v=uG43hjICE2U&feature=related.