APA (7e ed.) Bronvermelding

(1993). Blupages directory: Engineering & maintenance (3rd ed.). Blupages International, Inc.

Chicago (17e ed.) Bronvermelding

Blupages Directory: Engineering & Maintenance. 3rd ed. Quezon City: Blupages International, Inc, 1993.

MLA (9e ed.) Bronvermelding

Blupages Directory: Engineering & Maintenance. 3rd ed. Blupages International, Inc, 1993.

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