Postal and delivery innovation in the digital economy / ed. Michael A. Crew e Timothy J. Brennan
Annual report 2014 [documento eletrónico] / Swiss Post
CRC - Annual report 2015 : Analysys of the postal service market 2015 / Communications Regulation Comission
Relatório anual : 2015 / Correios
Statistique des services postaux 2014 / Union Postale Universelle
Strategic perspectives on the postal market [document eletrónico] / International Post Corporation
Regulatory report : postal / Cullen International