E-COM, electronic computer originated first-class mail, users guide /
United States Postal Service.
APA Citation
United States Postal Service. (1983). E-COM, electronic computer originated first-class mail, users guide. Chicago: Manager, E-COM Sales & Service .
MLA Citation
United States Postal Service. E-COM, Electronic Computer Originated First-class Mail, Users Guide. Chicago: Manager, E-COM Sales & Service , 1983.
Warning: These citations may not always be complete (especially for serials).