Cita APA (7th ed.)

Papag, R., Felicia, R., & Padilla, A. (2001). Kwadradong daigdig. IBON Foundation Inc.

Cita Chicago (17th ed.)

Papag, Ron, R.E Felicia, i America Padilla. Kwadradong Daigdig. Manila: IBON Foundation Inc, 2001.

Cita MLA (9th ed.)

Papag, Ron, et al. Kwadradong Daigdig. IBON Foundation Inc, 2001.