Which reference is correct?

Question $7$ options:

$1)$

Colquitt, G$.,$ Pritchard, T$.,$ & McCollum, S$.(2011).$ The personalized system of instruction in fitness education. Journal of Physical Education, Recreation & Dance,$82(6),46-54.$ doi:$10\mathrm{.}1080/07303084\mathrm{.}2011\mathrm{.}10598645.$

$2)$

Colquitt, G$.,$ Pritchard, T$.,$ & McCollum, S$.(2011).$ The personalized system of instruction in fitness education. Journal of Physical Education, Recreation & Dance,$82(6),46-54.$ doi:$10\mathrm{.}1080/07303084\mathrm{.}2011\mathrm{.}10598645$

$3)$

Colquitt, G$.,$ Pritchard, T$.,$ & McCollum, S$.(2011).$ The personalized system of instruction in fitness education. Journal of Physical Education, Recreation & Dance,$82(6),46-54.$ doi:$10\mathrm{.}1080/07303084\mathrm{.}2011\mathrm{.}10598645$

$4)$

Colquitt, G$.,$ Pritchard, T$.,$ & McCollum, S$.(2011).$ The personalized system of instruction in fitness education. Journal of Physical Education, Recreation & Dance,$82(6),46-54.$ doi:$10\mathrm{.}1080/07303084\mathrm{.}2011\mathrm{.}10598645$