SBL citation style
Book with more than three authors
SBL reference - 6.2.3
First footnote
7. Bernard Brandon Scott et al., Reading New Testament Greek (Peabody, MA: Hendrickson, 1993), 53.
Subsequent footnote
9. Scott et al., Reading New Testament Greek, 42.
Bibliography
Scott, Bernard Brandon, Margaret Dean, Kristen Sparks, and Frances LaZar. Reading New Testament Greek. Peabody, MA: Hendrickson, 1993.