Martinek. Business at the Margins of Capitalism: Charles H. Kerr and Company andthe Progressive Era Socialist Movement (PDF). Business and Economic History
比奥科岛自决运动(英语:Movement for the Self-Determination of Bioko Island) 赤道几内亚国民民主同盟(英语:National DemocraticUnionof Equatorial Guinea) 进步民主联盟(英语:Progressive Democratic Alliance
Weapons ofthe weak: everyday forms of peasant resistance. Yale University Press. 1985: 171. ISBN 978-0-300-03641-1. Jawad, Rana. Social welfare and religion