Mietzner, Marcus (2008). "Comparing Indonesia's Party Systems of the 1950s and the Post-Suharto Era: From Centrifugal to Centripetal Inter-Party Competition". Journal of Southeast Asian Studies. 39 (3): 431–453. doi:10.1017/S0022463408000337. ISSN0022-4634. JSTOR27751535.
Mietzner, Marcus (2008). "Comparing Indonesia's Party Systems of the 1950s and the Post-Suharto Era: From Centrifugal to Centripetal Inter-Party Competition". Journal of Southeast Asian Studies. 39 (3): 431–453. doi:10.1017/S0022463408000337. ISSN0022-4634. JSTOR27751535.
Mietzner, Marcus (2008). "Comparing Indonesia's Party Systems of the 1950s and the Post-Suharto Era: From Centrifugal to Centripetal Inter-Party Competition". Journal of Southeast Asian Studies. 39 (3): 431–453. doi:10.1017/S0022463408000337. ISSN0022-4634. JSTOR27751535.