National Assembly (NA) Speaker Asad Qaisar on Monday issued production orders of former president Asif Ali Zardari, ex-prime minister Shahid Khaqan Abbasi and Pakistan Muslim League-Nawaz (PML-N) leader Saad Rafique to ensure their participation in the session. It is to be mentioned here that Asif Ali Zardari, Shahid Khaqan Abbasi and Saad Rafique are in National Accountability Bureau (NAB) custody for the investigation of corruption references against them. The previous session of the assembly was adjourned on Friday without taking up agenda of the day due to lack of quorum.