Παραπομπή σε μορφή APA (7η εκδ.)

Maramba, F. D., & Obias, E. D. (1978). Biogas and waste recycling: The Philippine experience. Maya Farms Division, Liberty Flour Mills.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Maramba, Felix D., και Enrico D. Obias. Biogas and Waste Recycling: The Philippine Experience. Metro Manila, Philippines: Maya Farms Division, Liberty Flour Mills, 1978.

Παραπομπή σε μορφή MLA (9th εκδ.)

Maramba, Felix D., και Enrico D. Obias. Biogas and Waste Recycling: The Philippine Experience. Maya Farms Division, Liberty Flour Mills, 1978.