Table 1.

Most used GSCM practices in the previous studies.

Author	GSCM practices
Carter and Carter (1998)	green packaging
Zhu et al. (2005)	* green packaging * sale of excess inventory, * sale of scrap and used material, * environmental auditing programs, * commitment from senior managers * and total quality environment management
Carter and Carter (1998)	green packaging
Zhu et al. (2005)	* green packaging * sale of excess inventory, * sale of scrap and used material, * environmental auditing programs, * commitment from senior managers * and total quality environment management
[42]	* internal practices * and external practices
Large and Thomsen (2011)	green packaging
Tritos et al. (2013)	* Pro-active practices include: green purchasing practices, eco-design practices, reverse logistics practices; and * Re-active practice include: legislation and regulation.
[75]	* green purchasing, * eco-design, * environmental cooperation * and reverse logistics
[22]	* green purchasing, * green manufacturing, * green distribution and packaging, * green marketing, * Internal environmental management * environmental education * Investment Recovery