Hanggi, H. (1991). ASEAN and the ZOPFAN concept. Regional Strategic Studies Programme, Institute of Southeast Asian Studies.
Citazione stile Chigago Style (17a edizione)Hanggi, Heiner. ASEAN and the ZOPFAN Concept. Singapore: Regional Strategic Studies Programme, Institute of Southeast Asian Studies, 1991.
Citatione MLA (9a ed.)Hanggi, Heiner. ASEAN and the ZOPFAN Concept. Regional Strategic Studies Programme, Institute of Southeast Asian Studies, 1991.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.