Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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