Παραπομπή σε μορφή APA (7η εκδ.)

Hansen, S., & Mercker, H. (1989). Philippine Assistance for Rural and Urban Development: Profile of an NGO in the context of the Philippine development situation. [s.n.].

Παραπομπή σε μορφή Chicago (17η εκδ.)

Hansen, Sven, και Hinrich Mercker. Philippine Assistance for Rural and Urban Development: Profile of an NGO in the Context of the Philippine Development Situation. Berlin/Gottinger: [s.n.], 1989.

Παραπομπή σε μορφή MLA (9th εκδ.)

Hansen, Sven, και Hinrich Mercker. Philippine Assistance for Rural and Urban Development: Profile of an NGO in the Context of the Philippine Development Situation. [s.n.], 1989.