A Subsequent Footnote
As mentioned earlier, the first footnote referring to a given source should supply the complete publication data. However, subsequent footnotes to the same source should use the author and short-title format.
AUTHOR TITLE PAGE
Davey, Urban Christianity and the Global Order, 43.
However, note that if you have a footnote reference to the same source as in the immediately preceding footnote, whether that be a first footnote, or a subsequent footnote, then you should use the Latin abbreviation ibid (ibidem = in the same place), followed by the page number. For example,
1 Charles H. Talbert, Reading John: A Literary and Theological Commentary on the Fourth Gospel and the Johannine Epistles (New York: Crossroads, 1992), 127.
2 Ibid., 129