As mentioned... (HC Deb (2001-02) 391 col. 982).
House abbreviation Deb (Parliamentary Session) Volume number col. column number
HC Deb (2001-02) 391 col. 982
HL Deb (2005-06) 685 col. 767
Use HL for House of Lords and HC for House of Commons.
Deb stands for Debate and col. stands for column.
NOTE: Law students should use the OSCOLA system to cite legal references.