Παραπομπή σε μορφή APA (7η εκδ.)

Ellison, B. K. (1973). Labour intensive methods in road construction. Dept. of Public Works, Roads and Bridges Division.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Ellison, B. K. Labour Intensive Methods in Road Construction. [Port Moresby]: Dept. of Public Works, Roads and Bridges Division, 1973.

Παραπομπή σε μορφή MLA (9th εκδ.)

Ellison, B. K. Labour Intensive Methods in Road Construction. Dept. of Public Works, Roads and Bridges Division, 1973.