2013API SPEC Q1-2013 Specification for Quality Management System Requirements for Manufacturing Organizations for the Petroleum and Natural Gas Industry (Ninth Edition; Effective Date June 1@ 2014)
2007API SPEC Q1-2007 Specification for Quality Programs for the Petroleum@ Petrochemical and Natural Gas Industry (Eighth Edition; ISO TS 29001: 2003 Adoption)
2003API SPEC Q1-2003 Specification for Quality Programs for the Petroleum@ Petrochemical and Natural Gas Industry (Seventh Edition)
1999API SPEC Q1-1999 Specification for Quality Programs for the Petroleum and Natural Gas Industry (Sixth Edition)