reference was filed in Election Commission of Pakistan (ECP) against PTI Chairman Imran Khan and former chief justice Saqib Nisar
Audio leak: govt files reference against Imran Khan,

Audio leak: Govt files reference against Imran, former CJP .

Reference filed against Imran, Saqib Nisar and Asad

ECP receives complaint against Nisar, Imran for 'selling PTI

PML-N files references against Imran Khan, Saqib Nisar .

PML-N Leaders Filed Reference Against Imran Khan A
Reference filed against Imran Khan, ex-CJP Saqib Nisar
Reference Filed Against Imran Khan and Former CJP