- ^ a b c Ruppersburg 1994, p. 3.
- ^ Lloyd-Smith 2004, p. 61.
- ^ Roberts 1994, p. 37.
- ^ Martin & Savoy 2009, pp. 57–59.
- ^ Singal 1997, pp. 357–360.
- ^ a b Yamaguchi 2004, p. 166.
- ^ Millgate 1987, p. 10.
- ^ Anderson 2007, p. 11.
- ^ Brooks 1963, p. 375.
- ^ Faulkner 1990, p. 60.
- ^ Hamblin & Peek 1999, p. 228.
- ^ a b Brooks 1963, pp. 49–50.
- ^ Hamblin & Peek 1999, p. 69.
- ^ a b Hamblin & Peek 1999, p. 231.
- ^ Hlavsa 1991.
- ^ Fowler & Abadie 2007, pp. 2–4.
- ^ Fowler & Abadie 2007, p. 21.
- ^ Fowler & Abadie 2007, p. 165.
- ^ Brooks 1963, pp. 57–59.
- ^ Millgate 1987, p. 18.
- ^ Kartiganer & Abadie 1999, p. 113.
- ^ Brooks 1963, pp. 67–68.
- ^ Brooks 1963, p. 47.
- ^ a b Millgate 1987, p. 12.
- ^ Hamblin & Peek 1999, pp. 146–147.
- ^ Millgate 1987, p. 15.
- ^ Karem 2004, p. 35.
- ^ Karem 2004, p. 36.
- ^ Lacayo 2005.
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