Παραπομπή σε μορφή APA (7η εκδ.)

Concepcion, M., & Flieger, W. (1980). Measurement of outreach effects and sampling scheme. Philippine Center for Economic Development.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Concepcion, Mercedes, και Wilhelm Flieger. Measurement of Outreach Effects and Sampling Scheme. Quezon City: Philippine Center for Economic Development, 1980.

Παραπομπή σε μορφή MLA (9th εκδ.)

Concepcion, Mercedes, και Wilhelm Flieger. Measurement of Outreach Effects and Sampling Scheme. Philippine Center for Economic Development, 1980.