APA (7e ed.) Bronvermelding

Philippine Postal Corporation. The New ZIP code of the Philippines. Philippine Postal Corporation.

Chicago (17e ed.) Bronvermelding

Philippine Postal Corporation. The New ZIP Code of the Philippines. [Manila]: Philippine Postal Corporation.

MLA (9e ed.) Bronvermelding

Philippine Postal Corporation. The New ZIP Code of the Philippines. Philippine Postal Corporation.

Let op: Deze citaties zijn niet altijd 100% accuraat.