Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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